A method of killing and removing bacteria, mold, mildew or fungus from a surface or keratin substrate includes contacting the surface with an aqueous solution containing a multi carboxylic alpha hydroxy acid, a mono carboxylic organic acid and optionally Aloe. The aqueous solution has a pH of less than 2. The method can also be used to deodorize fabrics, surfaces or stagnant water. The method can also be used to treat wounds and skin irritations.
