Fruit fly problem — pour 1/4 cup apple cider vinegar and 1/4 cup water into a small bowl; add a few drops of dish washing liquid (I use Dawn). Place the bowl in the area where the fruit flies are the worse (my kitchen counter—no matter how clean I keep it and the sink).
After a few hours the bottom of the bowl was covered in dead fruit flies. I replaced the mixture daily for the first three days. I now replace it about every third day and am only seeing a dozen or so per day. It works like a charm.
We tried that first, and we did catch some. Also used red wine. But nothing worked like these did, with a little Guinness in the bottom:
https://www.tractorsupply.com/tsc/product/raid-fly-stick-pack-of-2