Cover shoulders with a towel. Unlock spray nozzle. Onto dry hair, and holding the spray applicator approximately 10cm from the hair, spray to evenly cover the hair and scalp until the hair is saturated. Massage the solution into the scalp for 5 minutes. Leave in hair for 20 minutes. Optional: Use the comb provided to remove the dead lice and eggs. Wipe the lice and eggs off the comb and onto a tissue. Rinse thoroughly. Follow with regular shampoo routine.