The reason it is suggested to use two different types of cleansers is because they serve different purposes in the facial cleansing process. The oil-based cleanser works by removing oil-based impurities, such as makeup, sunscreen, serum, natural skin sebum, and other impurities. The water-based cleanser works by removing sweat and dirt that the first-step cleanser could not remove. Double cleansing is a process that helps your dermocosmetic products penetrate deeper into the skin, which is why it is suggested to use it during your nighttime routine, when you apply the majority of your active products.

Double cleansing is especially popular with people with oily skin because it combats excess oil production without leaving the skin too dry. This method is also very popular with anyone with acne-prone skin, as it is a great way to cleanse the face of bacteria, which are the cause of acne. Finally, the double cleansing method is the most popular face washing method for makeup lovers, because it is the best and most effective way to remove even the smallest particles of makeup.