For fruit
flies in kitchen put some apple vinegar in a cup, cover it with
saran wrap, make a few small holes in it with a knife and push the wrap
into the cup (not touching the vinegar) to make a dimple.
Works perfectly.
We use 2 parts molasses to one part apple vinegar. You
don't even need the
saran wrap!
People who have never actually tried doing it constantly claim that you
can catch more flies with honey than with vinegar.