The number one advantage of double cleansing is that your main cleanser is working with a clean face, making it more effective. The first round strips away makeup, sunscreen, dirt, oil and other environmental pollutants and impurities, so that your second cleanser doesn’t have to do double duty. This also ensures that any skincare products applied to the face after cleansing will be more effective as well, as there will be no physical barriers blocking their absorption.