Delighted Momma: DIY Skin Clearing Mask - 2 tsp of Indian Healing Clay (it is %100 Natural Calcium Bentonite Clay), 1 tbs Apple Cider Vinegar. Directions: In a glass bowl, mix the clay with the apple cider vinegar until you have a smooth mask consistency. Apply mask to clean skin. Leave the mask on for 15-30 minutes. Rinse and follow up with a moisturizer or toner. For deep pore cleansing - once a week. For acne - 2-3 times per week, with a day in between each mask.