Prevention is the best way to keep mice away. You can lower your chances of being chosen by these freeloading fuzzies by eliminating food sources for them. "Store your food in airtight containers, keep surfaces such as counters, cabinets, and floors free from crumbs, always put away leftovers and make sure your trash can is sealed,” recommends Wilson. Determine and eliminate their access points. “If you live in an older house (and even if you don't!) you'll want to take a flashlight and check the foundation for any cracks, holes, or crevices a mouse could use to gain access into your home,” explains Wilson. “Don't underestimate the damage if you do find cracks in a wall. Where there's a will, there's a way. Especially in the winter, when mice are actively seeking shelter from the dropping temperatures, they will chew, gnaw, and squirm through any damaged area.” Start by filling gaps and spaces in buildings, around trim and other areas with a combination of steel wool and either caulk or expanding foam sealant. Mice don’t like to chew through metal and expanding foam can fill small spaces quickly. But mice can squeeze through a space smaller than a dime so you must be thorough. Some people also have success with natural deterrents, like surface sprays or getting a cat.