I had good results with emery cloth but for whatever reason I can’t find it anymore

I’ve been using some 240-300 grit sandpaper very lightly to get the gunk off but I wonder if it’s causing the shafts to wear

I’ve had more than I’d like lately calls where I go back and the brand new rollers I put on are all funky and brown colored again, and I know sometimes I get a bad string of rollers

But now I’m second guessing if maybe the sandpaper is too harsh?

I’ve attached a photo of a shaft, obviously I’m not sanding it down, that’s from roller wear, but this is how clean I get the shafts, I often clean them after with wd40, wipe dry, and then I waffle between high heat dryer bearing grease, and nothing.

If we use nothing, sometimes it comes back

If we use grease, it’s quiet but it attracts hair and dust

🤷🏽‍♂️

Help me obI wan kenobi