Step 1: Rinse the lens with clear water to make water drop on the lens.

Step 2: squeeze a drop of detergent on your finger and apply it evenly on the lens with your index finger and thumb.

Step 3: Wash the detergent off the lens with gentle water. At this time, you will find that the lens is as clean as new, but there are still residual water droplets on it. Never wipe with a paper towel or a mirror.

Step 4: Take a small piece from the paper towel and wash off the water.

Detergent is very safe, and it will never corrode the lens after washing. It is easy to have residues attached to the eye surface with soap.