It's very basic, the only way to ensure that someone is lice free is to remove each and every nit and louse. Too often parents depend on products in their attempt to get rid of head lice. There are times where families will apply lice removal products to everyone in the family "just in case" someone has lice. This makes no sense but when people are anxious, they do illogical things! Relying on manually removing every nit is the only guarantee for success. Too often people rely on short cuts and don't spend the necessary time necessarty to hand remove nits and bugs. At Lice Be Gone, we never sell products as a replacement to manuall removal.