Hi, I used Dr. Earth liquid fertilizer (it has fish and sugars) and I have attracted a huge swarm of flies. I tried putting bag traps out and there's not one fly in them! They are just hanging out all over my exterior apartment walls. I think they are so full on fish fert already, that the traps don't interest them. I also have landscape fabric down and I think they like going under it. Maybe they are breeding under it? Any advice at all would be greatly appreciated!!!