I got myself a Ratzapper and got 4 rats in the first 4 days and then nothing for a while. I think the problem was because the ants were going after the bait. The bait was always completely covered in ants. I only recently setup a way where the Ratzapper would be on a bowl in the middle of a big dish filled with water so the ants wouldn't get to it and sure enough, I got 3 rats in a row. But, somehow, each of the rats were covered in ants, how is that possible?! Are they jumping from the celling or something?!