That's funny, that was similar to my experience. A month or more ago, I had set the 8 $2 rat traps I bought out, with half a grape on each I think, and the next morning one trap was sprung but nothing was in it. No traps ever sprung after that!

I'm ambivalent about the $200 A24 rat trap. I want them to stop but I don't much like killin'...