Reusable facial cotton rounds are a great way to help sustain the earth, but you must make sure to clean them properly and not like you wash your make-up brushes (you don’t either, do you?). As you use them, they become soiled with oil, dirt, and make-up. Look at them like mini towels, and treat them as you would treat any towel or wash cloth. Use them only once, and wash them along with your other linens. Use fragrance free detergent that has a neutral pH to make it gentle on the skin. Make sure not to overload your washer with detergent, as overdosing can cause detergent to get trapped within the fibers of your fabrics can cause direct irritation of the skin.