I wondered this same thing yesterday as I was noticing slip-stick-repeat behavior, which turned out to be a flat tire. I tried to vacuum the roller once, as I see some tire dust periodically on the floor and wonder if any gets inside the roller area. Will be curious to see what you learn.

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To breathe, to feel, to know I'm alive.

The Lama covered this a couple years ago: https://gplama.blogspot.com/...sic-maintenance.html

Oops, just saw snap in your original post; I'm not sure if these tips will be applicable to that.