1. Fold the cotton wipe, soak the edge with acetone, and carefully clean the edge of the reflector in the clockwise/counterclockwise direction; 2. Shake the bottle with molybdenum liquid properly; 3. Pull out a new cotton wipe and fold it, and soak its edges with molybdenum liquid, or drip several drops of molybdenum liquid directly on the mirror surface. 4. Starting from the edge of the mirror, gently drag the cotton cloth on the mirror surface, and repeat the above process several times continuously, so that the molybdenum cleaning agent should slowly volatilize. 5. Take out another cotton wipe and dry the molybdenum solution on its surface. Pay attention to wipe should move back and forth or do circular motion. 6. Then the edge of a piece of folded cotton cloth is soaked with acetone, gently dragging on the mirror surface, starting from the edge of the mirror. The above process is repeated until the mirror is clean. 7. In order to extend the life of the mirror, you can use pure air or nitrogen to gently blow the mirror.