Patent ID: 8569220

Claim:
A hard surface cleaning solution for descaling calcium, lime and rust, consisting essentially of: a first organic acid comprising a carboxylic acid selected from the group consisting of lactic acid, glycolic acid, formic acid, citric acid and acetic acid; a second organic acid comprising a carboxylic acid different from the first organic acid and selected from the group consisting of gluconic acid, glycolic acid, formic acid, citric acid and acetic acid; a surfactant selected from the group consisting of amine oxides; a solvent selected from the group consisting of ether alcohols; and a diluent; wherein the solution has a pH ranging from about 2.0 to about 2.4; wherein the solution effectively descales calcium, lime and rust; and wherein the surfactant does not contain salt in an amount sufficient to materially affect the pH of the hard surface cleaning solution.