It is that time of year in our house when the fruit flies start to invade. I tend to have lots of fresh produce sitting in bowls on my counters, and I'm not always the best at taking out the kitchen compost... So we often get a swarm of fruit flies in the kitchen during the summer. A few years ago I learned a secret for getting rid of them pretty quickly.
First put any produce in the fridge (and empty your compost pail!). Then fill a glass* with a little bit of apple cider vinegar and place a funnel in the glass (a rolled up paper funnel works just as well). Let it sit all day or night. The flies will go down the funnel to get to the apple cider vinegar, but won't be able to get out again. When you've captured the little guys, just dump them all down the drain (if there are any still flying around in the glass, go outside before taking out the funnel!).
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*The glass in the photo are the glasses from made out of wine bottles that I blogged about last year. I still LOVE them. Very sturdy!