Picture of No More Roaches
I have wanted to write this Instructable for a long time but could not bear the thought of a photo of a roach. I found a plastic one; problem solved. I think you get the idea from that sentence that I am just a little bit, somewhat, sort of, come to think of it, mildly, TERRIFIED of roaches. This is the story of how I got rid of the roaches in my home and they have stayed gone for 10 months now after just the initial treatment.
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Step 1: What you will need

Picture of What you will need
maple syrup pour.jpg
Boric acid powder*
Karo syrup - you may substitute honey or maple syrup or pancake syrup
Rice flour - you may substitute any flour you have on hand
1 Popsicle stick
1 Mixing bowl

Amounts as follows:
2 parts Boric acid
1 part rice flour
enough Karo syrup to make a peanut butter like consistency mixture

Important note: Boric acid powder is not something you want to inhale (get into your eyes or swallow) so mix this up outside. Wear a dust mask too until it is mixed up. It has no odor.

For a 2800 square foot home with 4 bathrooms, I mixed 2 cups of boric acid with 1 cup rice powder and about 3/4 cup of Karo syrup. I used a plastic bowl to mix in and stuck the bowl and left over bait up into the attic/crawl space when I was done baiting.

*(available in hardware stores in the US as "Roach Prufe" (this was the only way I was able to buy it, the canister is 98% boric acid and 2% blue coloring).

Step 2: What my kitchen used to look like

Picture of What my kitchen used to look like
For every roach you see there are probably 100 hiding in the walls. If you see a roach in the daytime it means you have such an infestation that they are crowding each other out of their hiding places. Did I say gross?

Step 3: What my kitchen looks like now

Picture of What my kitchen looks like now
No more roaches!
acline25 days ago
I did this yesterday and added a few tablespoons of olive oil so it will stay moist. Also, I found 100% pure boric acid for $2 at Dollar General. So, you don't have to go to a hardware store for 98% boric acid if you have Dollar General stores near you. They also sell light corn syrup (the same thing as Karo syrup) for $1.25.
acline26 days ago
I'm going to do this today but I have a few questions:
Does the electricity to outlets need to be cut off before removing the faceplates?
Will this roach bait attract mice or rats with the sweet smell? I just saw a giant rat scurry across my neighbor's patio and I don't want to bait my house with stuff to kill roaches that will attract the mice and rats to move in. I hate this. I can't handle roaches and critters. It has me thoroughly freaked-I can't handle going into my kitchen at night for fear of seeing a roach. My anxiety is too high over this and I'm in the middle of college finals, but I have to take a day to deal with this.
Also, thank you so much for making this intructable. I'm a broke college student and can't afford an exterminator-although now that I've read your story, I understand it wouldn't have helped for the long term anyhow.
aaryak11 days ago

my shoe works better than all these methods.
n then its splashhh

boneyabba11 days ago

Hi Ninzerbean! Great article. Questions- I read that the paste still works after it hardens... if that is the case does it matter if you use something with oil or not? Before I found your article I made two rounds with just water, flour, sugar, borax. The first round I spread on a cookie sheet and let dry then spread the clods around- many dead roaches for days after. Still saw some roaches though so I made another batch- this batch I spread around in batter form... couple deaders- several live. I went to make a third batch, but noticed I've still got clods and dried batter paste from both batches around- which makes me think I should still be finding dead ones... Thoughts?

shyatt218 days ago

I made this, after scouring the interwebs for different recipes what i have found is the same. It doesn't warn the roaches not to come back. The point is they eat it and they dry up and die. The roaches in the nests eat those roaches and die also. The syrup and flour/rice powder is the attractant. This is the same technique used in the little pods. Just much cheaper to make a large amount. Depending on your infestation it can take weeks to see results. This is why bombing/spraying to kill visible ones is important. Roaches come in waves as eggs hatch, so you will see them in crease in numbers before they dissipate. This bait will generally outlast the waves of roaches which is why it is much better than the pods. Once you properly bait your house with this stuff and they start dying off your house will be protected as long as it remains appealing to new roaches that come in from outside. Using an oil agent to keep it from getting rock hard can make it last longer. Source: I have successfully destroyed a german roach infestation with this recipe.

Ninzerbean (author)  shyatt217 days ago
No, the bait doesn't warn the roaches not to go to your house. Roaches live in a colony like bees, they communicated to each other about where to go get the best food. The German ones live inside, I wrote this 'ible for the regular ones I had to deal with in Florida. When I wrote this back in '08 I think it was, there was no information online about baits, just digging and digging led to me discover that the pest control companies were stopping the use of this type of bait because people were canceling their contracts. Your information is very helpful, thank you for sharing.
shyatt2 shyatt218 days ago

Protip, german roaches use your electrical lines to get around the house. Make sure to bait inside your outlets, take off the coverings and bait inside.

chennaiman2 months ago

I am in India and have the German roaches troubling us.Its heartening to know you have done so much work to eliminate the roaches. I want to try your method. Since Karo syrup is not available can I use honey instead? Or, should I try peanut butter for results? I will keep you posted on the results.

Ninzerbean (author)  chennaiman2 months ago
I think peanut butter. Because of the oil that will keep the bait softer longer. But now that it will smell good be sure to put it in places that little kids or dogs won't get to. It would be harmless in such a small dose of course, but why take chances.

And of course honey will work just fine, why not add a little edible oil to the honey because the honey is so thick. If you add water to thin the honey it sets up too fast.

Thanks for writing and keep me posted, we may all learn from what you share. I just can't believe that when I die that this will be my legacy.

Hi.. Thanks for your response. Day 1 has passed but no results so far. I used honey instead of Karo, Maple syrup or Peanut butter as these are very expensive here. I am hoping to see results soon.

Ninzerbean (author)  chennaiman1 month ago

It's been 21 days - how is it going?

Hi....For some reason, honey with boric acid powder and rice flour seems to have minimal effect on roaches. There seems to be a population explosion suddenly. Am wondering if you can give me any ideas. It is frustrating but I am patient. The roaches are slowly spreading out.

Ninzerbean (author)  chennaiman1 month ago

I wish I was there to see what you are doing, it's sort of confusing to me about how you have baited so many times with a variety of baits - this should only be a once every few years thing to do. When you write that you have "set up" the bait again it makes me wonder how and why you have to do this. Once the bait is in all the places - under the sink, on top of doors, near water pipes, behind drawers etc., that is it. It does take quite a long to time to do a place properly - about 4 hours for an average size home. Unscrewing all the switchplates and putting them back on is the reason. But when you say the bait was flakey... well it won't stick to anything if it is flaky, so how can you use it? The ratio of powder to liquid is to get a peanut butter consistency, so you add more or less liquid to get that consistency.

Chennaiman, are you reading all the steps to the 'ible? Sometimes people think there is one one or two steps because they have not selected the button to "see all steps on one page". Could that be the problem?

German roaches are very difficult to get rid of, there is something wrong with the comments on the 'ibles right now so you can't read the 400+ comments that used to be here, there was so much info and it's sad it is gone, but you have to get rid of all the roaches you see to start with if you have German ones, they are different in that they live inside vs outside like the regular ones we have in the US, the giant ones. You have to be more vigilant with the vacuum everyday, maybe set off a gas canister, get rid of all the cardboard, find out where they are living in your house (they love video game players) and attack that area. I think with an infestation such as yours (German ones) you may need more help than I can give you with my bait. That is why I wish the comments would come back, they are working on it but it's a low priority. People had shared great ideas there. I don't know what else to do.

​The bait worked in the kitchen but to a limited extent only. I had used boric acid powder, rice flour and honey. There are a few ones still moving around after 3 weeks. I cleaned up the mess regularly. Last evening, I have set up the bait again but used peanut butter instead of honey. But I have not got the jelly type consistency with it. Its kind of dry and flaky. Will wait and share developments.
Sjc08581 month ago
We just moved into this home Jan and I started noticing signs of roaches pretty soon after. Roach feces all in cabinets ( which I thought was just dirt at first as I have never had issues with roaches to this extent until now), a dead roach a day in the kitchen along with 2 live ones on different occasions, also found some old egg cases in the cabinets about a week ago. I am not sure if they were here with the last tenants or if they invaded in between while the house was dark and vacant. The house was clean ( or so we thought) when we arrived but after I decided to pull out the appliances I realized it wasn't so clean. The housing office has been working with me. I found some huge gaps that lead to inaccessible open dark spaces in our bottom kitchen cabinets. I believe that is where some were hanging out so they came out and sealed off those large gaps.. I have also been using the foam anywhere I can. I have become obsessed and have realized I have a fear of these things! I do not have the German ones but the American ones and I had read where they prefer feasting on organic matter. I found some feces in my daughters clothing drawers. It is a very old piece so I am sure they are loving it. Your concoction: I came across this a few weeks ago and decided to give this a try a few days ago. I did not have the roach prufe but I had hot shot powder which contains 99% boric acid so that is what I used. I put the stuff everywhere! I cleaned out all my cabinets from roach poo, keep my house spotless, used the foam and thought I had sealed up all the gaps. I was hoping that would solve it but this morning I found fresh poo in my cabinets.. I am hoping that the hot shot stuff will work, if it doesn't I may go get the roach prufe and do it all over again. I am thinking it may take time for this to work, depending on how many are lurking around here. How long did it take for you to be rid if them? I'm sorry if this was answered in a previous comment, I am going to start searching through them now, just needed to get this out! I told my husband he may have to commit me! Lol!
Ninzerbean (author)  Sjc08581 month ago
There is a problem with the comment section of 'ibles and so you will only be able to go back 4 months which is a shame because there were over 400 comments. But anyway we will figure this out. OK, I just have to ask these questions - did you put the bait in all the places I suggest? Are you looking at all the steps of the 'ible? The stuff you used sounds like it should be just fine - you did mix it up with the flour and syrup right? You need to do a really big cleaning and get rid of the egg cases that could be anywhere. Vacuum every day for a while. This should work in about 24 hours. There should not be any live ones running around the way you are having them. There must be another egress into your place.

Many people have reported to me that the roaches are living in their playstation things. Check that our if you have one. They like warm places.

There just has to be something you are missing, this should not be happening. Do you have carpets? Could they be under the carpets? Put bait there. I really don't think you have to use Roach Pruf .

I know how you feel, I really do, I wish there was something else I could suggest. But this will get better. Keep in touch.
Thanks for your prompt response. Yes, I followed the recipe using flour and maple syrup. I had to use a little more syrup to get the consistency and I put it everywhere you suggested. I really think the brown banded ones are coming from the old dresser I have since that is the direction they were headed from and I found some poo in their recently. Gonna take out all her clothes, wash them and put them elsewhere. I think I should treat the dresser real well. I feel like we should just bomb this whole place but I am sure our exterminator will not want to do that. I thought they might be under the carpets as well and brought that up to the exterminator. He wasn't sold. We will see.:/
Ninzerbean (author)  Sjc08581 month ago

Just keep in mind that your exterminator does not want to get rid of your roaches or he will be out of a job. You can bomb the place yourself, that is easy, sometimes it is necessary too. But really training the roaches to think of your place as a death trap and telling all their buddies is the key. When they bring the bait back to where they live they will spread the message. They are sort of like bees that way.

True. I'm hoping that what you described is happening right now since I put the bait out this week and those little roaches were pretty small so I am guessing those egg casings were there before I baited. I know those brown banded prefer organic matter but am hopeful they will at least nibble on that stuff! I may have to bomb. I have never done that before. Will I have to wash everything I own after the fact? So exhausted! Lol! The one positive thing is I have massively de-cluttered and continue to do so. Though I am on the verge of throwing everything out at this point. Ha! Never knew what a nightmare this could be. Thank you again for taking time to help! Really appreciate it!
Sjc0858 Sjc08581 month ago
So we fumigated this past weekend. We spent about $50 and put cans all around the house to include the garage and attic. I expected to find dead roaches everywhere upon return but only found about 5 dead babies and a couple of silver fish. We have been thinking that the roaches were hanging out in the walls and attic so hopefully it killed them. Since last weekend I haven't seen a single roach or feces. I am hopeful but afraid to state we are rid of them as of yet.:)
Ninzerbean (author)  Sjc08581 month ago

That's a good sign. Sometimes it takes extra measures to get control, but once you do then the bait will be all you need and it should last for years. Congrats!

Sjc0858 Sjc08581 month ago
K, right after posting this I went into my daughters room and found 3 live baby brown banded roaches, one crawling on the wall and 2 on the carpet. I am just overwhelmed and over this mess.:(
Sjc0858 Sjc08581 month ago
Btw, I have been vacuuming every day downstairs were we really "live" but should probably start upstairs as well.. Thanks again!
dlo161 month ago

HEY ! I am going to try this but let me tell u a little bit about my problem. I live in an apartment, the whole building has a roach problem. Now my kitchen is so infested they roam during the day, huge ones. My husband and I used to move all the furniture everything and start killing them, once a month. When it came time to do it this time, we barely moved the fridge and we saw a glimpse of 40-50 in one spot. It was horrendous, we couldn't kill that many because we noticed that every time we kill 20-30 it doubles. So we left them and decided to look for an alternative. We found this and we are going to try it, now my only question is, do I leave some of this in a bowl next to the fridge or do I leave some near a wall? I'm really hoping this work. We are moving in about 3 months but it seems like an eternity!

Ninzerbean (author)  dlo161 month ago
Well I guess you could leave some in a bowl, or put it on some cardboard so you can throw it out later on. You probably won't want to clean that bowl - also, the bait gets so hard it would be really difficult to clean. If possible you could post a link or just put up a sign in the building that says to go to "No More Roaches" so everyone could join the fight. Be sure to hit the button that says to see all the steps on one page so you don't miss any, and tell everyone else that as well. This could be a great way to meet your neighbors that you are moving away from anyhow... still. For a problem as big as yours is, it might be best to bomb the apt first. Keep in touch and let me know how it goes.
I just want to say that yes, this does in fact WORK! along with sweeping up, wiping down countertops and drying out the sink every night before bed the treats did work for me. haven't seen a roach NOT ONE SINGLE ROACH for 3 weeks or more now!!! can't express how nice it is to have my kitchen back! personally, I put out fresh "treats" every other night on post it notes and put them all over the kitchen (while singing COME N GET IT YALL ITS SUPPER TIME LOL) but instead of the flour and stuff I used BBQ sauce with a dab of water (as to not dry fast) and good helping of boric acid. you did an excellent job on your ible and I thank you for putting it out there! I did fumigate before going to work one morning (not the fogger, the fumigator has more % of killing power and is not messy) but after cleaning up the dead roach massacre I still saw them but just stayed with my game face on and gave them the BBQ treats. just keep dishes done, sink wiped (even sprinkled boric in sink too before bed), and sweep n stuff n ya should be good (: thx again instructables!
Ninzerbean (author)  dixiecrystal1 month ago
Thanks for sharing Dixie!
Jelei2 months ago
Hi, I made this mixture and put dabs of it all over my apartment. It's been about 3 weeks and I have seen less roaches but still see baby and adult roaches. My question is does the mixture still work even after it hardens. I noticed that it's so hard, it's even hard to get off if I try to take it off, I'm just worried it worked at first and now that it dried up it's not working. Thanks
Ninzerbean (author)  Jelei2 months ago
If you are still seeing roaches I have to wonder how thorough you were. When you say dabs all over did you follow the directions of putting it on waterpipes, behind kitchen drawers on top of doors etc? It takes a long time to do it right. There would be no reason to remove the dabs, and yes they get hard and they still work. But you must be really thorough the first time. If you miss spots - like not putting it in the walls etc you are really not making your house a place the roaches are going to tell their friends not to go to. Also, if you are seeing baby roaches you have existing egg cases, you need to vacuum everywhere and everything. Hope that helps.
Jelei Ninzerbean2 months ago
Thank you, I have got every spot you can think of except the inside of walls that's the tricky part how could I get inside the walls?
Ninzerbean (author)  Jelei2 months ago

It's not to code and all that, but did you read about taking off all the covers on the light switches and outlets? I fear many questions I get are because the whole 'ible is not being read. You have to click on the button to see all the steps on one page. Did you do that? That is really why the baiting takes as long as it does to do properly.

Jelei Ninzerbean2 months ago
Thank you I have read it again and will do the walls and hope that does the trick!
Jelei2 months ago
I added some under the sinks, on the pipes, on top of the door frames, behind Picture frames, under the fridge, oven, mirrors .. Everywhere it's just so frustrating because I have a 4 month old baby and wish they could go away and ofcourse the landlord got an exterminator but that hasn't worked.
nico67073 months ago
Hello Ninzerbean … I am seeing roaches (I think german type) at least 2 or 3 a day (1/2 Inch long) in my kitchen (counter) and only one marching on one of my bathroom's walls. I have spread Boric Acid behind my stove, refrigerator, corners, etc … I live in an apartment and I see that there could be many sources of the "infection." I saw a few roaches on the hall's floor and a couple more in the garbage room. I checked with my super and what their exterminator uses is a type of repelant … I think I made a mistake calling the exterminator …. this guy is using that stuff that does not really solve the problem … after his visit, I've been using pure boric acid but at this point I don't know who will die first, the roaches or me. I've been using that powder all over my 800 SF apartment. Another hypothesis I have is that the plague comes from the apt's heaters (this building was constructed in 1957) … my question to you is whether I can use your recipe inside hot places (thinking on putting the bait inside the heaters) … wouldn't it dry very quickly and lose any of its magic properties ? Other question, how long does it take to not to see any more roaches marching in my apt ? … is it matter of days or weeks ? ….. none of the commercially advertised products seemed to work either. Any other input will be really appreciated.

Thank you.
Ninzerbean (author)  nico67073 months ago
Well spreading boric acid around will only kill the roaches that run across it, and it won't harm you by the way, unless you have your skeleton on the outside of your body. But the bait is a way to attract them, plus you can stick it too anything. But the heat will not dry the bait up, instead it will melt. So that is not a good thing for the heater - is it the heater vents that you think they are coming through? Why? Over the years of being the roach person I have realized that the German ones are a lot harder to kill than my nemesis, the regular palmetto roach. But it is still do-able. You must read all 400+ comments though, well, just skim them until you find the ones that apply - there is a wealth of help there.
Keep me posted on your progress.
Oh yes, your last question, you will see results the next day. But keep in mind that it takes a long time to properly do a place, even 800 sq. ft. Make sure you are hitting the 'see all steps on one page' button so you are reading the whole 'ible.
Thanks Ninzerbean … Yes, I am thinking they come from the the heaters vents …. could it be possible ? I assume heaters provide them warm shelter and a place to reproduce. I am getting ready my arsenal to attack these unwanted visitors this weekend and I don't want to miss nor a single spot where they might hide.
Ninzerbean (author)  nico67073 months ago
Did you read the comment about the pasta water? Anyway, good luck!

Ok… here is my report. I applied the bait as indicated in the manual. I also applied pure acid boric under the refrigerator and dishwasher …. and since I had gotten caulking for cracks and crevices, I drilled some holes at some locations on my walls, large enough to introduce the tip of the boric acid container and easy to repair after injecting some acid into the walls. I also removed the covers of all outlets (and I found, of course, roach eggs) so I applied boric acid inside the electric boxes. Well, after 10 days… nor even one roach dead or alive (that part I don't get … nor even dead bodies?)…. so all of this brings me to think that I conquered my kitchen from the German domain. Now, I began seeing them in the bathroom (did de move?)… so I applied the bait all over the bathroom (doors frames, cabinets, behind the toilet) but for some weird reason the bait is ignored by the roaches. I see one roach every 3-4 days ( I hate them … so even 1 roach a month is an infestation for me) …. anyway, I got this product from Dupond (Advion) and I applied it all strategic points in my bathroom … let's see if it works. Keep you informed guys.

Ninzerbean (author)  nico67072 months ago

Nico6707, I am guessing that when you 'did' the whole house that you skipped the bathroom? Look, the thing with the boric acid powder is that is will not work in the same way at all - yes, if a roach runs across it it will die, but death is not what you want at first, you want the roaches to take the BAIT back to their colony to tell their friends not to go to your house. I can't stress enough pushing the button that lets you view all the steps on one page, that way you don't go off half cocked with less than the full amount of information. Injecting boric acid into your walls will not work in the long run, what you are going here is for the long run - if you do this right you will only have to do it every 2 or 3 or 4 years. Killing roaches is NOT the answer, you must bait them with the mixture so they go back to the colony to warn their friends. That is the only way this works. Poisons are just a quick (like a month) fix.

By mixing two poisons and my bait you are not going to have success because you need to BAIT the WHOLE house. If you kill a roach that doesn't get back to the colony, and you will kill them with the bait if they eat it at your house, you are setting yourself up to be infested again.

To think like a roach you must understand the colony they live in. They are not solitary monsters. Think bees. I wish you had only used the bait. If I were you I would sweep up all the power and put bait where you put the powder. Thank you for getting back to me, and also for trying to help that poor guy who obviously did not follow the 'ible.

One more thing…. I discovered that roaches came from my neighbors apartments …so I installed a door sweep and a whether seal around the frame of my door …. That helped a big deal too.


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