
Use a good cotton swab dipped in alcohol, and wipe it in a spiral shape starting from the center to the outer ring, and gently wipe the surface to avoid secondary stains caused by crossing the wiping tracks. At the same time, cotton swabs or lens cleaning paper cannot be reused. In addition, do not wipe with water, but use high-purity alcohol to wipe. The evaporation of high-purity alcohol will not leave traces, but water and low-purity alcohol will leave traces, causing local laser absorption and overheating, causing damage to the lens or film layer, which also affects the use of the laser.








