Pour a small amount of shampoo, about a teaspoonful, into your palm. Massage the shampoo gently into the hair roots with the fingertips, covering the whole scalp. Start at the scalp and work through to the ends. Massage with the flat of your hands. This shouldn’t take too long, as the shampoo needs only to be in contact with the hair for half a minute to clean thoroughly. Rinse your hair thoroughly with lukewarm water.