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.

Update: By the time I moved from this home the roaches stayed gone for 6 years, I baited one more time inbetween. It is important to hit the button that says to 'view all steps on one page' or you will think that this 'ible is only one step long - it is 8 steps long. Be sure to read all of the steps before asking questions. Other questions you might have will be answered in the comment section.

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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).
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I just moved into an apartment 4 days ago and I think it's infested with small flying roaches. I first saw them on the night of day 2 in the kitchen. At least 3 that night, I only killed 1. They're telling me it's just water bugs and roaches don't fly. I've only seen them in the kitchen and a couple in the living room. Today I put boric acid all over the kitchen, window seals, front doorway and even some in the living room. I didn't come across this until after.. Do you think what I did will help? What do I do?
Ninzerbean (author)  Ballroomblitzz8 days ago
Roaches fly. Do you think I would seriously tell you that sprinkling boric acid all over your house would work if I spent the time and effort to write this 'ible and to answers questions every single week? While I enjoy helping other people rid their homes of roaches I do not enjoy having to deal with bizarrely inane questions such as yours. I apologize for being offensive but you deserve the truth.
Well, thank you for verifying that they fly. Sorry for wasting your time with my inane question.
Ninzerbean (author)  Ballroomblitzz7 days ago

Dear Ballroomblitzz, I did not read all of your question and I was rude to you. Let me start over and say that sprinkling the boric acid powder will get on the feet of the roaches that run over it and it will kill them, it will kill them probably before they can return to the colony. As a consequence there is only a short term gain and the opportunity to dissuade the colony from hanging out at your house is lost. I don't think you need to wipe it up or anything but it hurts more in the long run than helps. I am upset at being told all of my faults by the real estate broker who had listed my house yesterday. I had a former husband who did that frequently so you'd think I would be used to it but it turns out it still really hurts and I was very angry and I took it out on you. Please accept my apology for being rude.

Yeah your first response kinda bummed me out, not what I expected but I understand, thank you for getting back to me and apologizing. Hope you're having a better day today! Take care.

also you should take care to find out what kind of roaches you are dealing with. if you are dealing with german cockroaches (tiny, creepy, crawling on the wall by the tens and 20's) you may have trouble killing them since they tend to reproduce VERY quickly and by their numbers end up overrunning most of their natural predators except for house centipedes who love eating roaches but who also look creepy as hell. they also are very hardy when it comes to poisons. of course boric acid isn't a poison and thus they cannot build any immunity or resistance to it but at the most it will stunt their numbers. next you have the oriental roaches which are larger slower and seldom seen since they prefer to live around water. they generally walk on floors and have trouble making it up walls or on counters. american cockroaches are the third and they (as well as oriental cockroaches) prefer to live outdoors but both make their way into homes when they can. german roaches cannot fly so you are in luck. i had german cockroaches at an apartment once and i tried everything from sprays to boric acid to exterminators to diatomaceous earth. nothing made a dent. i eventually moved out. i recently moved into this apartment and found oriental cockroaches. laid down some boric acid bait stations and poured boric acid in every dark nook and cranny and had my neighboring apartments do the same. no more roaches going on 9 months now.

Awesome, thanks!
Ninzerbean (author)  george.shaub2 days ago

I try to get everyone to get their neighbors onboard but I think people have a fear that only they have roaches. Silly. Thank you for your input.

henrydsuza7 days ago
jules080313 days ago
We are having to move from the apartment we have been living in for three years because it is INFESTED with german roaches. I know they are inside our electronics and one of our couches. My question is, can we take these items and use the bait to get rid of them? It sucks that our furniture has to be left behind because these nasty apartments are infested. I know for a fact it isn't just our apartment that has this problem. We have had the landlord gel the apartment and it didn't work. We have used baits, the ortho home defense from Home Depot and it is STILL infested. We move next weekend and we are worried we will somehow take them along to our new place. Any suggestions?
Ninzerbean (author)  jules080312 days ago

The bait will not work for your situation. You know where there are so you must get rid of them. But taking apart your electronics is going to be very very hard, and what if you leave an egg case behind? Your couch - wow, I don't know how you would be successful there. This is just terrible. I wish so much that I could help but this system is more about making your house or apartment free of roaches and more about the large non-German ones. You need not baits but a very strong vacuum. Baits are for luring roaches to the bait so they take it back to their colony and the other roaches then learn not to go to your house, but because you have them and know where there are and are not removing them physically, they will still be there. Somehow the situation must have gotten out of control and now... I think you should start over. But if you see even one single roach in your new place - which hopefully you will bait the day you move in, you will kill it right away.

Robin F1 month ago

Sounds like your potion is effective and has helped so many people...kudos! I came across your Instructable after I found roaches under my house living on the fiberglass insulation between the floor joists. We had a small flood in our kitchen, and in order to dry our wood floors I went under the house to see if the insulation was wet. It was, so I pulled it all down and found live roaches living happily on top of the insulation. I know the water must be the attraction for them, but if we only had the water problem for a couple of weeks, I wonder if the roaches were there before? We will replace the insulation that was wet, but I'm afraid that roaches may have gotten to the other insulation as well. ? Replacing all of the insulation will be costly and doesn't promise to solve the roach issue. My question...what would you do in this situation? Thanks!!!

Ninzerbean (author)  Robin F17 days ago

Sorry that my response is late - there is a glitch with Instructables and I am not being notified of comments coming in. Anyway I hope I am not too late - there is no need to replace your insulation, the water attracted the roaches. They may have been there before, but replacing the insulation will have no effect on their being there now or later. You simply need to bait.

Awesome. I appreciate you responding and will bait away down there. The wet insulation is in bad shape so I will replace what looks damaged and bait at the same time. Thanks again for your help!

Freakedout1 month ago

I read all steps multiple times before even attempting to try this. I am like you, cannot even open an encyclopedia with a bug photo in it. My husband and I bought our home several years ago and it is surrounded by trees and near a pond. I have never seen a roach before moving here. The yard is polluted with them, they are under every rock. Ewwwe! We saw 2 inside before we moved in and then never saw any more for a few years. It appears that they come in through the basement. I do not see them often but, it has been mor frequent in the last few years. I would rather die than call an exterminator. We live in a rural area where everyone would talk & think that you were just filthy pigs. Not true. After exhausting every idea, I came upon your intstructible. First of all, may God bless you for trying to help others! I followed your instructions to the letter at the beginning of October 2014. Never saw any after the 23rd of October. Then all of a sudden, they are coming back. First, I found a few dead ones. That was ok. Dead is good! Now, I have seen 2 live ones crawling in my living room on 2 different occasions. Do I need to repeat the process? It absolutely worked for 3 months. No exceptions. Why are they back now? Have you experienced this, or has anyone else? I trust your responses because you really do know what you are talking about. Please help me.

Ninzerbean (author)  Freakedout17 days ago

This can happen if there is a lot of rain and it drives the roaches inside to seek shelter, there is nothing you can do about it until they find the bait. Obviously they did not hear from the former roach residents of your house that your house is a bad place to be. As long as you baited your WHOLE house the bait should last for about 3 or 4 years before you would need to refresh it. Also maybe you brought something into the house that was infested? I did this myself with an item from a garage sale, ugh, gross, freaked out etc. I am sorry not to have gotten to your comment sooner - there seems to a be a glitch at Instructables and I am not getting notified of comments.

Also, if there are that many roaches around your house it might be a good idea to buy some products you can use outside to lessen the population - diatomaceous earth can be sprinkled around your yard. They hate that stuff. Wear a mask when you do the sprinkeling.

I really appreciate you responding. I agree, the rain totally complicates this issue. I am planning on treating outside as soon as the weather will cooperate. I will keep you updated. Again, thank you. You are helping a lot of people.

lupeluu 24 days ago
I was so excited to buy this product and get started on my road to clean happiness! !
But when I went to our local HARDWARE STORE they tell me ROACH PRUFE HAS BEEN DISCONTINUED! !!
What? !?
Everywhere? Probably worked TOO good and was putting Exterminator businesses OUT OF BUSINESS, is my guess.
So now please tell me. Will another brand of BORAC ACID WORK? This bottle says 100 percent, no coloring nor scents. I cannot live like this. It's exhausting to be bleaching DAY and NIGHT, be on top of everyone who comes into my apartment AND it's so embarrassing! ! Somebody HELP ME!
Ninzerbean (author)  lupeluu 17 days ago

There is a glitch at Instructables and I am not being notified of comments, so I'm sorry this response is late. Any product that is mostly boric acid will work. 97% - 100%, your common sense will lead you. Bleach is not something I would use in any way that you could be inhaling the fumes. It is very toxic and has no use in the bug war.

katieh931 month ago
Hi there! So I just moved in with my dad in Vegas. I understand the heat but it's dry? I don't know. Anyways, there's the German cockroaches that came in with used furniture. A armoire and a used TV that was included. (Maybe that's why it was so cheap?) Not a lot bevause i rarely see them. Anyways, they leave us alone but still crawl on the tables, walls and in the cabinets in the kitchen. They don't bug me as much because I lived on a ranch near a pond where it was infested with the red and black ones that bite during the night. So as long as they stay away, I'm not too worried. And also the fact that we are moving next month because the landlady won't get rid of them. The couch and ottoman are being left because we know for a fact that's where they are. And everything that can be left, will be. So what my question is, even if we do happen to bring along 1 or 2 (or 3 or 4), think it would be effective to do this just as a kill them off at the beginning and hopefully prevent them from repopulating?
Ninzerbean (author)  katieh931 month ago
Absolutely. Yes, bait the next house you move to right away.

I have a question? When you say bait what does that mean? Your instructions just say mix the bait in the bowl and then put the bowl away when you are done. What do I actually do with the bait? Spread it all over the floor? Wipe it on the walls? I am sorry it just doesn't explain how to actually use the bait. Thanks!

Ninzerbean (author)  seans817 days ago

I think you are only seeing step one. Step seven is quite detailed about where to place the bait.

lupeluu 25 days ago
I'm sooo desperate to get rid of these filthy roaches that when I couldn't find Roach Prufe i bought some other brand that says it's 100 0/0 BORIC ACID. PLEASE tell me if I follow all steps to this recipe I too can be rid if these nasty roaches FOREVER! !
I bought 2 bottles and am going to make enough for ALL 8 (2 bedroom) apartments. Other wise I think theyd never REALLY. Go away, right?
I'm on my way home now to try this and I gotta tell you, I'm excited! !
I just moved in with my 9 year old grandson and it's ridiculous how I have to bleach morning noon and. Night!!
Robin F1 month ago

BTW, we do not see signs of roaches inside our house. We use Ortho Home Defense from Lowes on the base of the exterior and interior walls every few months and have been lucky not to have a problem...or so I thought!

thumplover882 months ago
I have a long trail of roach infestations in my lifetime. :( I am currently living in townhouse apartments that have a German Roach infestation. Needless to say, it is uncontrollable. I treat the apartment, but it does nothing to the amount that are in this entire building. After 3 long years in this horrid place, I am happy to say that I am moving to a HOUSE. A real house!

Only.... I'm not so happy anymore. We had seen the house initially and checked for roaches. Cabinets, sinks, stove, bathroom, refrigerator, top of closets and doors all clear! No feces and no roaches, dead or alive. We happily paid our security deposit and signed the 1 year lease! We have decided to leave behind all furniture except our mattress and dog crates, which we would clean and inspect very well before the move. Well, all was for not, my dear friends! We received the key and went to shampoo the carpets/clean over the house before moving anything in.... And behold!!! Roaches. A couple dead here.... A few babies there. And the fridge.... Pulled it out to a nest behind/in it. And they're German roaches! I wouldn't have expected anything else of course!

"Enough is enough! I'm sick and tired of these monkey fightin bugs in my monkey fightin life!" - edit of Samuel L. Jackson 'Snakes on a Plane'

^ Without the edits.... That's how I felt at this point. We brought this issue to the landlord immediately and showed him the fridge and other areas. He said he had never seen that many... maybe one or two babies here and there. *facepalm* When there are babies.... There are parents/adults. Common knowledge to mankind in general about all living species. Anyways, he agreed to have an exterminator come and treat the house. So a plus!

Only, anymore, that is only a temporary solution. I have witnessed that personally. So after the exterminator came (today), she said based on what she saw behind the fridge... It was a heavy infestation (yay!).

The house has been empty for 2 months which I hope has tamed them down some, and I plan on using this method to treat the entire house before moving anything over. Thank you for this informative and helpful post and all the wonderful comments! It means the world to people like me who can't seem to shake these disgusting bugs from my life! Wish me luck! ;)

Happy Baiting everyone!
Ninzerbean (author)  thumplover882 months ago
Happy Baiting Kate! I am glad you read the comments, though there are more than 700 there is a lot of knowledge there. Good luck, after all you have been through you really deserve to live roach-free forever. Keep us posted on your progress. Has the fridge been removed/replaced? From what I have learned on here used fridges can be the source of many problems.
I unplugged the fridge immediately when I found the nest (It was running since the power was on) and pulled it away from the wall. It has been treated and about 50 dead ones fell out of it when I went in after the exterminator had left. I flushed all dead roaches down the toilet that I found to ensure any egg sacs were not going to hatch. We plan on replacing the fridge as soon as our finances permit! I will definitely post any results I have within a week or two. :)
Ninzerbean (author)  thumplover882 months ago

Be careful if you replace it with a used one. You are very brave, 50 roaches would have had me running down the road.

So an update is in need! I baited the entire house upon moving in 2 weeks ago and have seen only 3 roaches since! My husband and I have been very clean and DRY with the kitchen/bathroom and have kept our pet food bowls clean and sealed in with their food when it is not meal time. The fridge (which we have not replaced yet) has been roach free completely (have been daily checking 4-6 times) the entire 2 weeks.

I'm so happy I live in a home now that I can walk on the floors with no hesitation! My previous apartment was so bad you couldn't go barefoot without stepping on the hundreds of babies that stormed the kitchen floors at night. :(

I will be reapplying bait as needed and plan to do a total re-baiting every 6 months or so. Again, thanks for all the wonderful help and comments from everyone :)
ivan_s1 month ago

Tanks !!! Exelent

Mnmnm1 month ago
Idk how it is everywhere but here if you're renting and there's a roach infestation the landlord has to get rid of it or you can get the lease terminated. So to those people who are renting and feel stuck because of the lease check the laws in your area you may be able to end it.
karamba711 month ago


I have recently purchased a place abroad. I work from home and plan to spend half my time there. During my last brief visit (I went to arrange for some building work to be done), I found quite a few dead cockroaches, and I have a total phobia. When coming back home and doing research from a safe distance, I realised that the black spots I had seen on floors, inside kitchen drawers etc. is roach poo and that the thing which looked a bit like a mouse dropping is an egg case. When I wipe up the black spots, new ones appear so I am pretty sure there must be quite heavy activity going on although I have not seen many live ones (1 half dead, and 2 babies in December). I feel quite optimistic after reading your "'ible" and have ordered 2 kinds of gel in addition to everything I need for your recipe. I go back in 2 days time and look forward to trying to sort everything out, although I am also dreading it.

My main worry is that I am having the whole place fully rewired, which means a few weeks of loads of new holes being made in the walls and so on. There will probably be a lot of dust. I'll try to keep it as clean as possible, but do you think the building work will interfere with the baiting? I'll follow the caulk/foam tips for pipes, around windows etc. where no work is being done. Once it is all done, I'll do the electricity sockets as suggested.

It is really good of you to be so responsive and helping so many people, good on you!

Ninzerbean (author)  karamba711 month ago
Dear Karamba,
If I answer your question may I come visit? It sounds great in that it is sure to not have any roaches. Anyway the new wiring is a GREAT time to stick the bait in the holes in the walls. This is really super news. Roaches don't care about dust and dirt, they are looking for food. Just make sure your workers are neat freaks in that they don't stick food remains inside walls - a common practice - out of sight out of mind. Soda drinks are almost normal to find inside walls. But all in all this is the perfect time to bait. Get that stuff into every hole and opening that is made during the rewiring. Enjoy your roach-free second home!

If this works, and I am hopeful, you will be more than welcome ;-) I have some commercial gel baits which I will use in places as well.

I got here late last night, and I am pleased to say I have found no more dead roaches and no more faeces. I am happy, but also don't quite believe it. I am still going to blitz (although with a bit less urgency than I thought) and bait the flat, but I think and hope it was less bad than I thought and that it should all work out in the end.


First I like to thank you for your information you provided. But there thing is I live in the UAE and I just moved into a new studio that have roaches every. Where. Mainly the kitchen, the toilet and pretty much anywhere. But here I don't think I'll find the exact same poison you're using to kill those unnecessary insects. Could you please tell me a substitute to use or maybe the anything with the same effect. I got the studio for a year and I know for a guy I shouldn't be afraid of those, but I have the biggest phobia. I almost got a heart attack once seeing a dead one upside down.
Ninzerbean (author)  George.A.Baskharon1 month ago
Is there a reason you can't order boric acid online in the UAE? There is no substitute that I know of that is as safe to use, but I guess any poison disguised in something delicious would have the same effect. But it would have to be really inert - have no smell or bad taste. Really, I just don't know.

First I like to thank you for your information you provided. But there thing is I live in the UAE and I just moved into a new studio that have roaches every. Where. Mainly the kitchen, the toilet and pretty much anywhere. But here I don't think I'll find the exact same poison you're using to kill those unnecessary insects. Could you please tell me a substitute to use or maybe the anything with the same effect. I got the studio for a year and I know for a guy I shouldn't be afraid of those, but I have the biggest phobia. I almost got a heart attack once seeing a dead one upside down.
aryali1 month ago

Hi! Thank you for your well written instructable. i mixed flour, honey, boric acid powder as per your instructions two days ago. I baited my house as you suggested, especially around the kitchen area. I know it will take time to work but I have been seeing almost double/triple the amount of roaches in the past two nights after i placed the baits. I have been holding off on killing them on sight (one because they gross me out and two because I'm hoping they will eat the food and take it back to their lair.) I haven't seen them eat it (I put a few in cabinets in the corners so that I can check on the bait). Should I be worried that there the ratio isn't right? i mixed the flour/boric acid and added honey until it looked like peanut butter. I would greatly appreciate any advice! I've been poring over the comments but didn't find anyone saying that there was a big increase in roaches.

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