What should the lenses of a microscope be cleaned with to prevent scratching?

The lenses of a microscope should be cleaned with lens paper, which is specifically designed for this purpose. Lens paper is a soft, lint-free material that helps to remove dust, fingerprints, and smudges without scratching the glass surface of the lenses. Using inappropriate materials can lead to damage; for instance, paper towels or cloth handkerchiefs may contain fibers or textures that could scratch the lenses. Lens cloth, while beneficial for other optical devices, may not be as safe as lens paper specifically formulated for sensitive microscope lenses. Thus, opting for lens paper ensures that the integrity of the microscope's optical components is maintained, providing clear and accurate observations during use.