Before you begin identify the type of optic to be cleaned. Is it soft or hard, coated or not?
1. Use a can of filtered source or air to blow dust and particles off surface.
2. If needed, for most products use finger cots or latex gloves cleaned with alcohol.
3. Apply acetone or ethanol to a lint free wipe or lens tissue. Using a high intensity light wipe around the outer diameter of part first than with another tissue or wipe, wipe center to edge.