AM or PM: Once or twice a week, apply a generous amount of Glycol Lactic Mask to clean skin, taking care to avoiding the eye area. Leave on for ten minutes, sit back and relax. Rinse off with lukewarm water, a reusable cotton pad, or a damp washcloth. PS, if you feel a little tingle it’s totally normal. As with AHA products, this mask can make your skin more sun sensitive. Please wear an SPF after use. We don't recommend using an AHA mask for super-sensitive skin, but if you have doubts, do a patch test on an inconspicuous area before applying on your face. How to add to your clean routine: AM and PM: Cleanse skin thoroughly with Clean Jelly Oil Cleanser and pat skin dry. Then apply Glycol Lactic Mask, take ten and rinse thoroughly. Next, carefully apply Brightening Dark Circle Eye Cream to the eye contour area and gently massage until fully absorbed, taking care not to rub or tug at the skin. Finally, massage Glow Daily Vitamin C Gel Cream onto face and neck until absorbed as part of your morning routine, or Overnight Glow Dark Spot Sleeping Cream as part of your evening routine.