Cleaning the lens requires laser welding machine users or specific maintenance personnel to carefully clean the lens in strict accordance with the following maintenance methods. The specific operation steps are as follows:
Step 1: Wear a mask and rubber gloves (you can also wear finger cots on your fingers), and choose a place with less dust to clean the lenses;
Step 2: Take a piece of flat lens cleaning paper and cut it in half, drop a little 99.5% pure alcohol in the middle part (because the lens cleaning paper has a certain filtering effect, use the lower surface of the lens cleaning paper and the lens contact to wipe). 

Step 3: When wiping the lens with your fingertips, be careful that your fingertips should not be higher than the upper surface of the lens.

Step 4: Put the part of the alcohol on the lens cleaning paper on the lens, and pull it forward and backward to make the lens cleaning paper completely adsorbed on the lens and loosen the pollutants on the lens, and then gently pull it in one direction . In the process of pulling, since there is no alcohol in other parts of the lens cleaning paper, the excess alcohol on the lens can be blotted. Be careful not to leave alcohol on the lens, otherwise alcohol spots will form;

Step 5: Pick up the lens and face it to a bright place to observe whether the lens is wiped clean from below. If it is not wiped clean, replace with a new lens tissue and repeat the above steps (lens tissue cannot be reused).