If it is only slightly oxidized, you can choose to clean the oxidized part of the shoes with toothpaste and a hard brush, which can be washed white. If the oxidation is serious, deoxidizer can be used to alleviate the oxidation problem of AJ, but once the oxidant is used, it may be used all the time. At the same time, although deoxidation can also alleviate the oxidation problem of shoes, the damage to shoes is also considerable.
We can't keep AJ from being oxidized, so it will be oxidized even if we don't wear AJ, and shoes will inevitably come into contact with air in daily wear. Although oxidation is an inevitable process, we can slow it down. If you don't wear it, put it in a shoe box, and put antioxidants in the shoe box, similar to desiccant.