If your rollers are making noise it’s in the bearings. You can use PTFE spray but it won’t last.
I would recomend a VERY small amount of the grease you’d use to grease the z rods, like just touch it, on the bearing (metal on the end if anyone reading doesn’t know) and then spin the bearing. You won’t be able to do much if the spool itself is squeaking.
If you want, the rollers are in the store, AMS spare parts.