Considerations. While Barbicide will kill lice and lice eggs that end up on brushes and combs, it is not approved for use directly on your head. Thus, do not attempt to eradicate a lice infestation by soaking your hair in the solution. There are many safe, over-the-counter lice medications that will do the job.

What is the strongest thing to kill lice?

Some lice are resistant to pyrethrins and permethrin. That's when it makes sense to turn to stronger prescription drugs, such as ivermectin and spinosad (Natroba).

How do you disinfect for lice?

Wash items on a hot water cycle and dry on high heat for at least twenty minutes. The heated wash and dry will remove and kill any lice left. Carpets, mattresses, and flooring can simply be vacuumed and cleaned with everyday cleaning products.