Sound familiar? To get to the root of the problem, we talked to Davide Marinelli, hairstylist, Cricket ambassador, and founder of Davide Hair Studio in NYC. Below are some reasons your scalp may be greasing up—and what you can do to prevent it. Spoiler: It’s not just dry shampoo. Co-washing, or conditioner-only washing, is a common practice that helps hair retain its natural oils between shampooings. By incorporating a co-wash into your hair care routine, you’ll likely find strands are smoother and silkier. RELATED: How Often Should You Wash Your Hair? Our Top Tips