What to do if the heart rate lens of the Xiaomi Smart Band 9 is whitened/micro-cracked?

There is a low probability that some of the Xiaomi Smart Band 9's heart rate lenses will have hidden whitening/micro-cracking when exposed to strong external forces or large areas of oleic acid/cosmetics/alcohol. This phenomenon will not affect the normal usage of the product. If you need further inspection, please apply for after-sales services.
Note:
In daily use, it is recommended to avoid applying or spraying chemicals such as oleic acid, cosmetics, alcohol, perfume, etc. directly on the heart rate lens.