- Wet hair then thoroughly remove excess water before applying a quarter-sized amount of shampoo touch by touch onto 5 key zones of the hair. Add water and emulsify. Focus this first wash on the scalp using finger tips to massage the scalp and gently remove impurities. Rinse thoroughly. Apply a second quarter-sized amount of shampoo touch by touch and add water. The second lather will produce a more abundant foam which will help cleanse lengths all the way to the ends. Rinse thoroughly.