surfactant a citrus turpene and hard nanoparticles of sapphire and diamond principal ingredients are carried by commercial windshield cleaning solution or in water application_number US 17209408 A description the present solution and method remove build up of contaminants on the surface of plastic resulting in a much more optically clear lens cover and removal of mineral deposits this improves both the appearance of the lens and the safety of the lens cover the resulting surface is very smooth and resistant to future build up of contaminants the results are achieved without the use of tools or sandpaper buffers or other abrasion devices the improved appearance of the cleaned plastic may be achieved in five minutes or less per lens cover depending on humidity and climate conditions and lens condition the plastic lens covers are generally made of polycarbonate the lenses are marred by two general types of adherent material the first is mineral deposits such as calcium or other minerals these form tenacious insoluble buildup on the surface of the lens the other is road grime made up of dirt and hydrocarbon residues the presence of the grime makes the removal of the mineral deposits much more difficult the present invention has found that a combination of a surfactant a solvent and a detergent is not sufficient to clean discolored polycarbonate lenses well as they do not remove mineral buildup on lens two additional components are needed.