On Thu, 09 Mar 2017 01:29:33 -0500, wrote:

I can't figure out how to change the rollers, or I
would do it myself. I hear there are stainless steel
rollers out there too.

You don't want SS rollers. Then you will be wearing out the track
instead of the door.

+1 Nylon rollers are much quieter and has less friction.

(same on garage doors. I have one with nylon rollers and the other has
metal rollers.)