So, this recipe, which uses apple cider vinegar and dish soap, sort of works. It will trap fruit flies, but it certainly didn't trap all of the ones in my kitchen. Like, maybe 20% of them. (Trust me, it was in the right place and everything).
Make It Better
Mostly, you have to take out your garbage, do your dishes, rinse out your sink and drain, and toss fruit and veggies that are in your fridge as soon as they start to go bad.