What should you use to clean glass surface of microscope?

To clean the glass surface of a microscope, use lens tissue or a microfiber cloth that is specifically designed for optical surfaces. These materials are gentle and won't scratch the glass. If needed, use a small amount of lens cleaner or distilled water to moisten the cloth, but avoid using alcohol or ammonia-based cleaners, as they can damage coatings on the lenses. Always handle the optics carefully to maintain their integrity.