Typically, a cleanser refers to a product used to cleanse the face either to remove normal daily build-up or makeup (or both). If you are a heavy makeup wearer, it is advisable to use separate products. Use a targeted cleanser to remove the majority of your makeup with a secondary cleanser to remove the last traces. You can always test your combined cleanser for its effectiveness by using it, and then using a makeup removing wipe to see if you missed any residue (and how much you missed). Cleansers remove oil, dirt, dead skin cells, and the like, which all help to provide the skin a chance to breathe better, renew, and keep pores open. Cleansers that contain acne-fighting ingredients may be too strong for dry skin, as many acne preventive ingredients dry out the skin. Oilier skin will demand a cleanser with more strength than drier skin, so it is important to pay attention to what kind of ingredients and what the product is advertised to do.