Abstract: A cleaning solution for plastic headlight covers includes a saturation of crystallizable salts, such as ammonium sulfate or urea; an organic solvent, such as a terpene, glycol ether or alkyl alcohol; a buffered acid to maintain a pH between 3.0 and 5.5, such as citric acid, oxalic acid, sodium bisulfate, or boric acid; alumina nanoparticles of 0.05 micron size and other submicron sizes; as well as a sequestering (chelating) agent, surfactant, and hydrophilic combiner; all in an aqueous solution. The cleaning solution effectively removes the mineral solids from the crazed surface of a plastic headlight cover that form a base for accumulating organic residue and road grime. No abrasive scouring or recoating of the surface with an acrylic sealant is required.

Abstract: A solution for cleaning plastic headlight covers that includes an oily acid, a surfactant, a citrus turpene and hard nanoparticles of sapphire and diamond. Principal ingredients are carried by commercial windshield cleaning solution or in water.