Are they very slow moving? Could be fungus gnats from overwatered houseplants
This came up about a month ago. Here are some suggestions, including a further link to another series of suggestions:
I don't have houseplants, but I first noticed them after bringing bananas home from the grocery store. Evidently they breed real fast. I tried the apple cider vinegar and caught some. I cleaned the trash can and poured ammonia in it and down my drains. Woke up this morning and there are just a few left! Thanks for the help, they are so aggravating.
fruit flies. Hate them. Remove any fruit from the house for a few days.