be replaced after 5 - 7 days, depending upon the quantity of oil you put on it. Try growing peppermint plants near the entryways. You can use the mint in cooking, as well as it serving a deterrent purpose. Use dried snake feces. Visit a local reptile center, zoo, or pet store and ask for some dried snake poo. You can also sometimes find someone who owns a pet snake. Place near entrances and in places where mice seem to go. This will keep mice away. [3] Be sure to keep the feces out of the reach of children and pets. Zap mice with ultrasonic sounds. There are electronic units sold that emit an ultrasonic beeping sound that rodents hate. They should be available at your local home