To clean the exterior side of lense

To clean the exterior side of lenses, use a non-solvent cleaning solution designed for cleaning optics or eyeglasses. First remove dust with a soft brush or can of compressed air. Then moisten a piece of dry lint-free tissue or lens paper and clean the lens surfaces with a circular motion. Repeat with a second piece of paper moistened with lens solution if necessary. Repeat once again with dry lens paper until the lens is clean and dry. Use this same procedure for the eyepiece and objective lenses.