Help! Flies!
Does anyone know how to get rid of a fly infestation? We've searched and can't find any obvious reason why we suddenly have hundreds of flies. No exposed food, no dead mice (thankfully), and I've heard they can breed in houseplant soil, but the rooms with the flies are nowhere near the only room with any plants. We put up fly paper, one of which has caught dozens, but they're ignoring the other. I am about at the end of my rope.