Hear that scratch-scratch-scratch behind the walls or above the ceiling? If so, you’ve got critters. Mice, squirrels, and raccoons often find refuge in those cozy spaces. Once they do, it can mean destruction for your home—from ripped-up insulation to chewed-up wiring. Try trapping squirrels and raccoons, and then relocating them several miles away to keep them from finding their way back home. Avoid using poison to get rid of mice. Instead, seal up gaps and cracks where they can enter, then set traps until you don’t hear the scratching anymore.