Lubrication is maintenance, not a repair for damaged parts
Appropriate garage-door lubricant can reduce friction at certain moving metal contact points, but it will not straighten a bent track, repair a broken roller, restore a failed spring, or correct loose cables.
Before lubricating anything
Inspect the door visually. If it is crooked, off track, unusually heavy, or has damaged cables or springs, stop and arrange repair instead.
Keep tracks clean rather than greasy
Garage-door tracks generally guide the rollers and should not be treated as a surface to coat heavily with grease. Dust can cling to excess lubricant and create more buildup.
For a broader routine, use the maintenance checklist.