Mice are unwelcome pests that can invade many homes. While killing mice is always an effective way to handle the problem, it is not the most humane. Instead, consider making your own homemade mouse repellent that will keep mice from wanting to be in your home.
Used kitty litter is a natural mouse repellent, because cats are a common predator of mice. While having cats in the home is many times a deterrent in itself, placing a little used kitty litter around the home will repel mice even further. Scoop a handful of used kitty litter into a few plastic sandwich bags, leave them open, and place them around the home where mice are most present (such as the garage, basement and kitchen).
Mice are also repelled by the smell of peppermint. Crush a few pieces of peppermint and sprinkle around the home and lawn, or create a sprayable solution by mixing two cups water and 20 drops of peppermint essential oil in a spray bottle. Spray onto floor edges, in the garden and anywhere that mice tend to gather. Alternately, soak a few cotton balls in the peppermint essential oil and place them around the home and garden.
Dryer sheets repel mice, rats, garden moles and many other pests. Most dryer sheets contain oleander, which is a natural repellent (check the ingredients to make sure yours contains oleander). Simply place a few dryer sheets around the home and lawn or give a new purpose to your used dryer sheets by recycling them into a mouse repellent. Used sheets work just as effectively as new ones.
Mothballs also work as a mouse repellent. Purchase a box from your local grocery or hardware store, and place them on the floors in areas where mice commonly pass through (such as along baseboards). Mothballs will continue to repel until they've dissolved, at which time you need to place new mothballs around the home and lawn.