When? Once or twice a week, depending on skin type: - twice a week for combination to oily skin, - once a week for normal to combination skin. Where? Apply all over the face, avoiding the eye area. Apply to clean and dry skin. How? Apply a thin layer on the face and leave on for 5 to 10 minutes. Rinse thoroughly with warm water and gently dry without rubbing. It can also be used on smaller areas (forehead, nose, chin) to locally improve skin texture and reduce small imperfections (pimples and blackheads).