Fruit FLy-itis

Tis the season for fruit flies. Here’s a good technique for ridding your kitchen of those pesky creatures. Take a bottle of apple cider vinegar (doesn’t have to be a full bottle), remove the cap and place some plastic wrap over the opening, punching a few holes in it to let the scent out. Fruit flies will crawl in but not be able to get out. For added effectiveness, put a few drops of dish soap in the vinegar. This will break the surface tension of the vinegar so that the flies drop through it. 

http://www.goodhousekeeping.com/home/cleaning/tips/a25042/how-to-kill-fruit-flies/