Have a 2007 360 Express. The sliding wood doors for cabinet space over sink are not moving smoothly. looking for suggestions on what you may have used to lubricate the slide. there is not metal slide and wondering if there is a wax or something folks have used to get them to retract and open more smoothly. I am guessing the mechanism hidden behind the wall is something like a window shade roller but can't see it. thanks in advance for suggestions or things that worked.