Garmaine Staff asked 2 years ago

It seems I may have used the wrong lubricant for my LG clothes dryer rollers because the rollers kept seizing up. Since these rollers are simple and there are no bearings I did not put much thought into what lubricant to use:

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While I am not 100% sure I believe I either used Super Lube 51004 Synthetic Oil with PTFE or WD-40 Specialist Heavy Duty Multi-Purpose Grease

My question are:

  1. What lubricant, if any, should be used there?
  2. What could be that black film on axle? I believe it is culprit here.
  3. In particular, would grease be a better option here than oil because it would not mix with small lint particles (I suspect this is what may have happened here unless that is lube thickener or something like that)?