Absolute Clear is a non-toxic, pesticide-free product proven to eliminate head lice and their eggs in just one treatment. This cleansing product uses a combination of naturally occurring active enzymes to remove head lice and nits without the risk associated with pesticide poisons. One bottle, used as directed, has been 99% effective in removing the head lice and their nits. Absolute Clear dissolves nit glue, the sticky substance that attaches the lice eggs to hair shafts. One application of this lice shampoo gets rid of head lice and the nits because the enzymes in Absolute Clear soften the glue that holds the nits to the hair shaft, allowing them to be easily combed and rinsed away. The "resistance factor" never becomes an issue. The head lice and nits are off the head and down the drain in less than 30 minutes!