Off topic, but my old spring mousetraps are 100% effective. The newer designs have broken on me and proven nowhere near as fool-proof. Two tricks you NEED to employ. 1. Tweak the end of the plate that the little rod fits in so that it is a pain to set without it snapping. Most fit too secure and the vermin can pick them clean. 2. GLUE a peanut to the bait recess using hot glue. I never miss a mouse. Never. Occasionally I think the traps go off by themselves, but the bait is untouched. With gluing the peanut down I can catch several mice/moles/voles with a single baiting. I live in the woods and typically catch 20-40 rodents in my shed every year. I won't even get into chipmunks and groundhogs, but I get rid of them too!