What you needPeppermint Oil
This project shows you how to make and use natural products to create a mouse deterrent.
Mice do not like strong odors and peppermint oil is not their favorite.
Add a few drops of peppermint oil to cotton balls and place the balls around entry ways. If you have holes or openings, fill them with aluminum foil as mice can not chew through foil.
Remember to refresh the balls often to keep up the scent barrier.