The term refers to a product that cleans or removes dirt or other substances. A cleanser could be a detergent, and there are many types of cleansers that are produced with a specific objective or focus. For instance a degreaser or carburetor cleanser used in automotive mechanics for cleaning certain engine and car parts.
Other varieties include the ones used in cosmetology and dermatology or skin care. In this case, a cleanser is a facial care product that is used to remove make-up, dead skin cells, oil, dirt, and other types of pollutants from the skin of the face. This helps to unclog pores and prevent skin conditions such as acne. A cleanser can be used as part of a skin care regimen together with a toner and moisturizer.