Profisher has a rather unique method of ridding your kitchen of fruit flies. Make sure you start this after you have cleared your countertops of all food. Place any kind of juicy fruit on foil on the open rack of your oven. Leave open overnight. In the morning, close the oven door, set the temperature to 400 degrees and flies will be no more! This can, additionally, be performed in the microwave oven. Set plate of fresh fruit in the open microwave for about an hour. Close the door and set timer for two minutes. It doesn't get much easier than that!