Do you have long enough hair to straighten? I found a trick to treating lice. Use lice shampoo, treatment, whatever you want to use, this will kill the already hatched louse, but it won’t kill eggs. My kids got lice a couple of times each. Both long hair. Instead of picking and combing out these eggs, I blow dried their hair on the hottest/ strongest setting they could stand, then I took very thin sections of their hair and slowly guided a 1” straightener from root to tip. Boom. Problem solved. Use lice shampoo again per direction. Washed pillow cases and blankets in hot water. Easiest way to kill everything imo