The Collaborative International Dictionary of English v.0.48:
Cleanser \Cleans"er\ (kl[e^]nz"[~e]r), n. [AS. cl[=ae]nsere.] One who, or that which, cleanses; especially, a detergent or other preparation used for cleaning. --Arbuthnot. Syn: cleansing agent, cleaner. [1913 Webster]WordNet (r) 3.0 (2006):
cleanser n 1: a preparation used in cleaning something [syn: cleansing agent, cleanser, cleaner]