It helps if you have a straw on the spray can to direct it toward the bearing.
How to grease sliding door.
Grasp each end of the door.
Push the door up so that the wheels on the bottom of the door clear the track.
Open the sliding door and locate the bearing near the bottom.
Remove drapes blinds or any other window furnishings from your door.
A sliding door relies on an upper and lower track along with rollers that keep it in place to slide smoothly back and forth.
If the rollers are dirty you can try removing the door from the tracks cleaning the rollers and spraying them with a lubricant.
How to lubricate a sliding door.
If the track is gummed up with dirt.
Keep pushing the door upward.
Sliding glass doors use rollers to move along the track.
After vacuuming then take a small whisk or other similar brush and vigorously brush away any remaining dirt and grime.
The thorough way 1.
Pull it towards you at the same time until it clears the door.
However they can easily get dirty damaged or broken and cause your door to malfunction.