DevaCurl Scalp Puri(pH)y Exfoliating Spray - 236ml For All Waves, Curls, and Coils. Trichologist co-developed and formulated with a pH level for a healthy scalp, this liquid exfoliator with the Scalp Detoxifying Complex gently removes scalp buildup. Can also be used after extensions or protective styles. It’s a non-physical exfoliating spray with glycolic acid that exfoliates and detoxifies, removes buildup, dirt, and impurities from the scalp. Use Before cleansing, part curls, apply directly to scalp. Massage with fingertips. Leave in 1-3 minutes. Follow with a DevaCurl® cleanser and conditioner. Use every 3rd or 4th wash day or as needed.