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.
Step 1: Start
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
Step 3: Make Footholds
Step 4: Grand Finally
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.