Last night we finally trapped the mouse that made his/her nest on top of the intake manifold right alongside the carburetor of our '72 Satellite. It ate the cheese in two spring traps before finally getting caught in a sticky trap. That place sure seems to always be the preferred spot for a rodent to set up house for some reason or other.
Is this in a building? Don't load those spring traps up. Press the bait into the holes so they have to dig for it. I use peanuts. My neighbor superglues a sugar baby to his traps. Last forever and doesn't go rancid. Peanuts work good too.