Our unique head lice spray kills lice and lice eggs (nits) naturally using a non-toxic formula that contains sodium chloride, more commonly known as salt. Fast and easy to use, just spray on Licefreee Spray and it starts killing head lice and nits on contact. Allow the head lice spray to dry naturally, no rinsing or washing is needed. However, once the hair has dried completely after treatment, you may then resume regular grooming habits (i.e. wash hair, style, etc.