The proper treatment of body lice is application of lindane solution for about 10 to 15 minutes. The clothing and bedding to which a person has been exposed over the past month should be washed or dry-cleaned to ensure that the lice are destroyed. I once had a treatment failure because I used Nix to try to treat pubic lice, and the infestation persisted. When I called the company, they said they had no firm data regarding the effectiveness of Nix in treating pubic lice. I then had the patient use lindane, and the infestation was effectively eradicated.