The track which sliding doors glide in may become dirty or dented and the rollers beneath the doors may get worn
To remove the patio glass sliding door - open it to the center of
the opening, lift and pull outward at the bottom.
After the patio glass sliding door is removed from its track take
the opportunity to remove debris in the track using a stiff brush or a vacuum cleaner.
Replace your old rollers with new ones by removing your old patio
glass sliding door rollers from the door and matching them up to one found in Swisco's online catalog
patio glass door replacement
Also: How-to guide on replacing sliding glass door
To install a new patio sliding door track cut a stainless-steel
channel to the length of the dented track then snap the channel onto the old track, pressing it down
with a wood
block. Readjust the rollers by turning the roller adjusting-screws.
Replacement patio glass door sliding tracks can be found in Swisco's online catalog section of patio glass door accessories