Your first line of defense is to wash linens, pillowcases, towels, and any hats that have been used in the last 2 days with our Laundry Detergent. Brushes and combs need to be cleaned thoroughly after each use and for the many items that are not machine washable, but must also be cleaned you can use our Hair Fairies Repellent Spray. Remember head lice won’t survive longer than 24 to 48 hours off the human scalp.