I just installed some new sliding closet doors, but unfortunately they're a bit squeaky/noisy when operating. They are "Reliabilt" doors from Lowes, the actual company that makes these is SGA. There's nothing in the instructions and nothing on their website about suggested maintenance/lubrication.
I'm not entirely sure what the rollers are made of, they're some kind of plastic or nylon rollers that fit in an extruded aluminum track.
What kind of lubricant can I use that won't break down the plastic, or gum it up over time from dust/etc?