Chin Spin Issue?

Hey everyone - I was cleaning Hammond's cage this morning and found black flakes in the bottom of his cage. While trying to figure out what may have fallen into his cage I noticed a patch of coating missing off of his Chin Spin. I have had it less than a year and am not sure what could have caused this to happen? I was wondering if anyone else has had a similar issue? I have removed the wheel from his cage and have emailed quality cage company with pictures.

I am very worried and will be watching him closely as I am not sure if he has ingested any of the coating...

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