Spray lubricant into the hole on the edge of the door.
Vaseline on sliding door track.
For slightly tight sliding doors after cleaning the track i have sprayed furniture polish on the track pledge.
This is the point that needs to be lubricated and that s the reason for using a spray type lubricant.
Lift the sash as high as possible and apply a light coat to the lower tracks.
If you live in an area with ice and snow insulate sliding doors before the cold weather hits.
If you clean your sliding door tracks and rollers regularly choose a petroleum based lubricant.
Place the straw attached to the lubricant into the hole and press the trigger.
The rollers on a sliding glass door have bearings at their axles.
Works great no residue to speak of.
Look for the hole in the door over the tracks or on the inside of the door.
Wipe the glass door s tracks with warm water and soap before the temperature drops.
A silicone based lubricant will be adequate and won t attract dirt.
Your sliding glass will probably have a hole on the side.