Check underneath your sinks and inside cupboards for holes around plumbing fixtures or elsewhere. Stuff some new steel wool in the cracks: mice won't be able to eat through it.

Rats aren't just big mice; they're smarter, more persistent, and more serious pests. If you suspect that your problem isn't mice but rats, consider calling in an exterminator.

2torial #0440: Learn2 Capture a Mouse (Continued) If it doesn't work...   Move the furniture around. This sounds wacky, but it works. Mice will investigate the new arrangement and will be more inclined to come across a trap. Consider poisoning rather than capturing.     Step 5