Northern lice you can deal with, Southern lice is bad.
Speaking of lice, my wife is a spastic clean freak. Both kids got lice once. She had trouble getting rid of them on the first go with the medicine. Total whole home sterilization. Her mom convinced her to cake Vaseline in their hair and leave them in shower caps for 24 hours. It was hilarious watching her scrub their hair for days trying to get it out.