Take a bottle of Eucerin hand cream. Massage it into the scalp and coat your hair. Use almost the whole bottle. Put on a shower cap and sit around the house for 8 hours. Wash your hair with and comb it out with a nit comb. Repeat one week later.
The hand cream will smother the adults and loosen the nits so they comb out. Repeating the process with kill any adults that have hatched from the nits that weren't killed the first time.
The hand lotion washes out surprisingly well and your hair won't be very greasy.
I used a lice treatment from the pharmacy first and it didn't work. This hand lotion treatment does. It's a pain to sit around all day, of course.
Toss your hair brush and use a plastic comb until you are sure all the lice are dead. Wash your bedding in hot water and put your pillow in a plastic bag for a few days. Lice can't live long without being on a person.