It is very important to remove all of the nits in case they have not been killed. The shampoo may not kill all of the nits, and any that are still alive will hatch in about a week causing another infestation. Removing the nits is easiest when the hair is damp. It's best to go through the hair section by section until the entire head has been combed and checked. It is very tedious and takes a lot of time, but it's necessary to remove all of the nits.
Good lighting is important when trying to locate the nits.
Any clothing, sheets, hair accessories, or any other personal articles the infected person has come in contact with will need to be washed in hot, soapy water. If it is not possible to wash an item, it can be sealed in a plastic bag for a period of two weeks. Also, any area the infected person has come in contact with should be thoroughly cleaned and vacuumed. The vacuum bag will have to be disposed of so any live lice or eggs can't reinfest your home. Lice killing sprays are available to use on upholstery and carpets.