Instructables
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Picture of Easiest Bed Bug Trap
To start mix your sugar/yeast solution to bait the trap. Bed bugs are attracted to carbon dioxide, and yeast produce it as they feed on sugar.

Mix 2 cups of pure cain granulated sugar to 2 liters warm water. Use bottle or filtered water so to not have chlorine. Add a little yeast. If you buy a packet then use about 25% of it. Otherwise use about 1/2 a teaspoon.

Set that aside. You'll need it at the last step. It should be frothy by then. If not then it won't take long.
 
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Step 1: Start

Picture of Start
Bed bugs have become a major issue around our country (USA). I think it's because of our bad economy. People are picking things up from beside the road and carrying it into their houses. Before you do this you should be very careful because those things might hide bed bugs. Once you have them it's very hard to get rid of them. Traps are unlikely to solve your bed bug problem, but if you can't afford to pay expensive exterminators then traps may help.

This is the easiest bed bug trap.

Stuff:
    2 or 3 liter bottle
    Roll of Paper Towels
    Tape
    Scissors with a sharp point or include a knife or razor
    Sugar
    Yeast

Step 2: Prepare the bottle

Picture of Prepare the bottle
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Cut the top off along the top edge of the label.

Step 3: Make footholds

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The bed bugs can't climb the smooth plastic bottle, so you have to give them something to grab as they climb. Wrap the bottle with paper towel and tape it on. Make it even at the bottom. Cut off the excess at the top, but leave a little overhang.
Nunu2u229 months ago
Bed bugs are too small to see
They are tan colored when first hatched & very small but you can see them. When they've eaten, they have a dark spot in the middle. You can even see the eggs, but they are very small. A grown bed bug is actually quite large, maybe an eighth of an inch & dark red. They are about the size of an ant but leaf-shaped & thicker.

That's what I thought too, until I caught one under my shirt. It was very easy to see crawling around on my skin. They're not that small.

No, any bedbug that has fed is quite visible. The eggs are visible to the naked eye of anyone with good sight. The nymphs who haven't fed can be hard to see, but are by no means "too small" Nymphs who have just fed have an appearance similar to a red mite.

saidinmotion5 months ago
im trying this.. we live in a 120 square meter appartmen made with wood floors... we are tired of this annoying little f**** biting our little baby... if we catch some tonight i promise i will upload pictures.... someone told us to use an electric heater infront of the area were we know they are hiding to kill them with extreme heat: can someone provide feed back about this kind of complementary solution? is there a way to use fire safely to burn them out? do you think that regular big spray cam also help? (we are using Ortho) thanks for this amazing guide... Greetings from Mexico City!!!!
Yes, extreme heat & cold kill them, but it's very hard to do unless you're a professional. Line the room with diatomaceous earth. It's a bedbug insecticide. You can set off bedbug bombs available at Lowe's or Walmart, and spray cracks and corners with ammonia. It kills the bugs on contact, and makes them run from the area. Also, wash the crib sheets & blankets and pillows and spray the crib or bed with ammonia & vacuum frequently!! That's how we killed them.

Be careful with your baby and insecticides please. Do not use fire in the house. Since you are in an apartment, other tenants probably have the same problem and your building is infested. This is common. If you move you would have to leave all furniture and disinfect your clothing and all other cloth bedding, sheets pillows, etc.

georion1 year ago
have you tested your idea somewhere,where BEDBUGS are?????
manicmonday (author)  georion1 year ago
Yes, I have caught bed bugs in this trap.
It is very effective.
please let me know,
IrisH23 months ago

Is it important that
the bottle is 2 or 3 liters? I used 1,5 L but I didn’t caught any and they are
still biting me.

I used 20 oz. bottles but less of the mixture. We placed them on all four sides of the bed & couches. By morning, each trap had caught at least one baby. We killed all the bugs using ammonia diluted with water. It was just the eggs we worried about hatching & causing a new infestation.
toryleeann2 days ago
This really works. We were terrified the bed bugs would follow us to our new home. We killed all adults & newborn bugs, but there were still eggs. We placed the traps by the bed posts & couch legs where the eggs were & by morning, our trap had two babies in it. We used several 20 ounce bottles & less ingredients. It worked great. Thanks for the tip!!

Still need to get some yeast, but we will see what happens.

I have a question: I thought that you have to have a bag over the top of the trap because CO2 is lighter than air and will evaporate too fast and therefore will not attract them..Is this true?

CO2 is heavier than air. The Carbon atom makes it so.

nrob016 months ago

trying it :/

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Nunu2u229 months ago
They are called fruit flies
Mita Kulu made it!9 months ago

I catched one floating in the brew today. Great success!

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flychey2310 months ago

I actually just made this today. I used a faygo bottle instead; its one liter not as big as the regular soda bottle so I could fit it in places and then I just cut the "recipe in half", but anyway I placed it next to my sofa where I usually see them and in one hour I had already found three bed bugs floating in the solution! I could not be happier for how cheap and easy this trap is! Thank you so much (:

I tried this trap for mosquitoes last summer. Unfortunately it didn't work very well. I have heard about carbon dioxide traps being effective for bed bug infestations. If anyone gives this a try I would love to hear about the results.

manicmonday (author) 1 year ago
Addendum: After a week or two if you want to continue using the trap you will have to replace the bait. You will need to remove the top and then roll back the paper towel. Then pour out the old liquid and replace it with new.
manicmonday (author) 1 year ago
They fall into the liquid in the bottom. They can be seen, but would be hard to take a picture of.
rimar20001 year ago
Interesting. Maybe you could add a photo of the result (the trapped bed bugs).