clarifying shampoo1000ML The Oligo Professionnel Clarifying Shampoo is formulated to remove accumulated build up on the hair caused by everyday styling, promoting a cleaner and healthier scalp, while making hair shinier and more manageable. HOW TO USE: For weekly cleansing, apply Clarifying Shampoo to wet hair, massage and rinse. For deep cleansing, apply Clarifying Shampoo to wet hair, let sit for 3 5 minutes and rinse.