There seems to be a mildew spot in the polaroid lens. What should I do?

..... try it yourself. If the lens is moldy, take it apart and apply hydrogen peroxide for sterilization, which is easy to get dust. ............. will have to open it anyway to know. There was a lens loss once before, and the cleaner told me that it was only after disassembling that the bonded lens group had moldy spots, but it could not be seen outside the lens after assembly. I'll go out and find someone to take over. The normal disassembly of the lens does not affect the image quality, provided that the lens is not installed askew like Parkinson's when it is assembled. Generally there is a fixed clamping position. As long as we know the installation accuracy of each lens, ............ lens is not as high as expected. As long as you are careful, there should be no problem. The method of wiping the lens with saliva said by "enthusiastic netizens" upstairs is really effective. It is said that it seems that the enzyme in saliva plays a role in killing mold. I saw it in Photography and Video a long time ago. However, this method is only suitable for the surface cleaning of ordinary lenses. Some lenses with high refractive index are made of special optical materials with soft texture, which will damage the lenses if they are wiped rudely. Furthermore, if there are mildew spots on the joint between the two pieces, it can't be handled, so you need to buy moistureproof box.