Skin Prep – cleansing gel is a micro-peeling cleansing gel with AHAs to rid the skin of impurities, clarify and reduce shine. It also has a smoothing action and an anti-pollution effect. Key Components Glycolic Acid Gluconolactone Indication For combination to oily skin How To Use This facial cleanser is used as the second step in the Skin Prep cleansing routine, after the micellar solution or the perfecting cleansing oil, and before the exfoliating cream. Apply the product on wet skin and massage for 30 seconds. After the gel turns into foam, then rinse.