Instructables
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 3: Make footholds

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.
Nunu2u2224 days ago
Bed bugs are too small to see
Nunu2u2224 days ago
They are called fruit flies
Mita Kulu made it!25 days ago

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

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flychey232 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 (:

ChippMarshal7 months ago

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) 9 months 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.
georion9 months ago
have you tested your idea somewhere,where BEDBUGS are?????
manicmonday (author)  georion9 months ago
Yes, I have caught bed bugs in this trap.
georion georion9 months ago
please let me know,
manicmonday (author) 9 months ago
They fall into the liquid in the bottom. They can be seen, but would be hard to take a picture of.
rimar20009 months ago
Interesting. Maybe you could add a photo of the result (the trapped bed bugs).