I had tried making my own home made traps like some I have seen on Facebook but none ever worked. This trap was so amazing I ordered 3 more quart size ones for other areas around the house. The flies just land on it and walk around the lid maybe once then plop you see them swimming inside. The directions said it would take a while for the bait to activate but the results were almost immediate. The bait was pretty strong smelling. It was like a raw yeast smell. I was supposed to fill it 1/3 full of water and mix it up. I may have put too much water but it still worked wonderfully. I will put the 1/3 level in the quart size ones I ordered.