How do I use Power Shampoo? Customer Support June 19, 2019 10:09 Updated Wet hair. Massage gently into your scalp for at least 1 minute daily. Rinse thoroughly. Related articles How does Power Shampoo work? What are the ingredients in Power Shampoo? What is Power Shampoo? Is Power Shampoo sulfate and parabens free? What are the side effects of Tadalafil? Comments 0 comments Article is closed for comments.