The removal of head lice eggs (nits) can be very difficult and frustrating as nits are attached to the hair with a glue-like substance. It can also be used after head lice treatments to help remove nits. It contains acetic acid, which can help break the bond between the nits and the hair. This helps loosen the nits, allowing them to be combed out without difficulty. Unless all the nits are removed there is a risk of re-infestation of head lice as the nits hatch between seven to 10 days. Conditioner Shampoo does not kill head lice.