Allow Licefreee Spray! to air dry naturally before beginning the combing process. If you find you need to wet down the hair to make it easier to comb, you can apply more Licefreee Spray! to aid during the comb through process or apply a leave-in detangler or conditioner. It is not necessary to wash the hair before coming out the dead lice and nits, but you may wash it first if desired.