Clearing up lice also requires that you thoroughly clean house. Vacuum the rugs and furniture, and then wash all the child's clothes, hats, bedding, and towels in hot water. Dry-clean items you can’t wash, like stuffed animals, or seal them in plastic bags for two weeks. Experts recommend that you continue to check the hair for two to three weeks to make sure that all the lice and nits (eggs) are gone. Use another lice kit after 10 days. This will kill any bugs that survived the first round of treatment.