Natural remedies like mayonnaise, tea tree oil and other products have not been shown to be any more effective than just combing the wet hair.
In order to get the lice off your hair, they NEED TO BE COMB USING a lice pick.
When the combing begins, strand after strand, the lice ending up on a paper towel. Lice don't live for very long once they're picked off their host's hair.
Lice Knowing You, a clinic Portland where my SIL, they have to hand comb out all the lice and nits. Sometimes they get some cases so severe it would take a year to hand pick them all out!! .The best comb out on the market is the Terminator comb..
ANY questions about lice can contact your local Health Department.