1. Get a small jar that you may have around the house. 2. Place small pieces of banana and or apple in the jar. 3. place a small piece of plastic wrap over the top. 4. Poke a few small whole's in the top with a "sharp" pencil.
Within hour's they will fly in and not fly out. Make sure the wholes aren't too big.
Thanks to my son Ross who researched it out for me and set it up.
This works great! Oh, yeah, place the jar in the area in which you have the fruit flies flying around.