15 Best Clarifying Shampoos 2022 - With Prices And Reviews 6-Moroccanoil. Moroccanoil clarifying shampoo is applicable for people with dry hair. Made with pure argan oil, you can use it once a week for reducing scalp buildup. It smoothes your hair and adds more health to it. This is the best clarifying shampoo for hydrating your hair and keeping it shiny.