I store my Cub Cadet in my shed in the backyard, and there's always been a few mice in there, but they've mostly left the tractor alone. But the past couple months there have been mouse nests inside the tractor engine and I have to thoroughly check it over for mouse nests every time I use it. I'm getting fed up with them, and I want them dead. I've tried a couple repellents with no success. Short of getting an angry cat, what is the best way to get rid of them? Traps would work but I would need about 100 of them. Any other suggestions?