This past week out of nowhere our apartment has just had an epidemic of fruit flies. We don't know where they came from. We take the trash out and do the dishes regularly. We keep all the animals' cages clean. There's no rotten fruit or food or anything out ever. But all of the sudden there is a swarm of fruit flies in the kitchen. I think they might be in our plumbing or something because there was also a dozen or so in the bathroom the other day, and none in the rooms between the bathroom and the kitchen. We put up fly paper and that's caught a lot, we've bought a carniverous plant and that's caught a few, and we even made a homemade banana-in-a-partly-sealed-glass trap that caught a grand total of one fruit fly. So does anyone have any other ways to fix the problem? The big thing is because of the pets and birds we can't use any kind of pesticide that could harm them.