harris peppermint oil mice & rodent repellent spray for house and car engines, humane mouse trap substitute, 20oz harris harris rodent repellent spray uses natural cinnamon and peppermint plant oils to humanely repel mice and rats in indoor and outdoor settings. the 20oz spray deterrent is long lasting, safe and has a pleasant scent to humans that rodents can't stand. it's also great for car wiring and car engines to prevent expensive electrical repairs. for best results, use separately from traps, baits and poisons that often work to attract mouse and rats. this spray should only be used in combination with other repelling products, such as a granule pouches or ultrasonic pest repellers. simply spray our mint oil mice control solution in the affected areas around your house/home. this will help deter mice from entering your garage, kitchen, bathroom, or even vehicle or rv. for the very best results repeat according to label directions. take back control of your home and keep the mice away!