ROR is a high-performance cleaning solution designed to remove the microscopic film of oil that can remain on surfaces, even after they've been cleaned by other methods. Gets glass super clear with minimal effort, and the microscopically clean surface discourages the accumulation of futher dust. It really works! Use it for lenses, filters, microscope parts, scanner glass, camera surfaces, and more. Not for use on polycarbonate optics, sensors or sensor covers, or focusing screens.