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
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.
2 or 3 liter bottle
Roll of Paper Towels
Scissors with a sharp point or include a knife or razor
Step 2: Prepare the Bottle
Cut the top off along the top edge of the label.
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.
Step 4: Grand Finally
Fold the top over into the bottle, then invert the bottle top and insert it into the bottle. It should be even at the top with no plastic sticking up.
You are done. You can add a little talc powder inside to make it more slippery, but I haven't found that necessary.
Put about 1/4 cup of sugar into the bottle and then about 3 inches of the sugar/yeast solution.
Put excess solution into the fridge. The yeast will go dormant in the cold, but become active again when warmed up.
Place it in a place where you want it to catch bed bugs and it won't get knocked over. You might find bed bugs in it in the morning. If you don't, that doesn't mean there are no bed bugs. They will only come if they are hungry.