Insect repellent is a product used to deter insects from entering or staying in an area. Common solutions include SHOO, a spray that uses natural ingredients such as peppermint oil to repel insects; MOTHBALL, a chemical substance that releases a strong odor to repel insects; DEET, a chemical compound used in insect repellents; OFF, a brand of insect repellent; SCREEN, a physical barrier used to keep insects out; and CAMPHOR, a plant-based substance used to repel insects.