Instructables
Picture of Fruit Fly/Gnat Catcher
I really hate these little guys and they reproduce so quickly!  So this is a super great solution that I found =)

Step 1:

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4 TBL. apple cider vinegar
2 drops dish soap
1 small cup of your choice


Step 2:

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Put everything in your cup and watch them die! ;)  This will start working as soon as you put it out.  Change the vinegar out daily.
 
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they also seem to be attracted to light (my computer monitor) Im gana rig a base up with LEDs and post pictures.