Repels Lice Safely and Naturally. Safe & non toxic, LiceLogic Repel Conditioning Hair Spray is infused with natural essential oils which are known to deter lice and other insects. It is blended with our proprietary plant based enzyme and Jojoba oil to provide effective repellency and conditioning and detangling, and will leave hair soft and freshly scented with each spray. Can be used on wet or dry hair.