Clear Skin With One Product by Abi Duplechin Clear Skin With One ProductMix equal parts of the clay and apple cider vinegar or water. Use a nonmetal bowl and spoon. I use about 2 tablespoons of clay and apple cider vinegar/water. I've been using this for about 3 weeks and I've DEFIANTLY seen a difference in my skin. My skin is so much clearer. I leave it on for 20-30 mins. And I use it once a week.