A: Fruit flies can be a nuisance in the summer. Try making a fruit fly trap: take a small mason jar, fill with a third of the way with apple cider vinegar (or red wine vinegar, white vinegar, etc.) Drop a tiny dollop of soap in, cover with plastic wrap, and take a fork and poke a few small holes in the top. The idea is that the fruit flies go in but can get back out, and drown in the liquid. If you are having problems with bigger house flies, just make the holes slightly bigger for them. We promise this trap works excellently!