Orion 5810 Optics Cleaning Fluid for Coated Lenses Fluid safely breaks down and removes harmful oil and dirt from all coated lens surfaces Clean telescope and eyepiece optics yield higher light transmission levels and provide clear, high resolution views Specially formulated cleaning fluid will not damage optical coatings Orion Optics Cleaning Fluid also helps to reduce dew formation on optical surfaces Recommended for use with Orion Lens Cleaning Tissue, sold separately