Is it okay to lubricate garage door tracks?

It is generally not okay to lubricate garage door tracks in the traditional sense of greasing them, and doing so can actually cause more harm than good. The garage door tracks are designed to guide the rollers, not to be a lubricated bearing surface. If you apply heavy grease, oil, or WD-40 to the tracks, it will attract dust, dirt, pet hair, and grit, forming a thick abrasive paste that clogs the rollers and makes the door noisier and harder to move. It can also cause the rollers to slip instead of roll, leading to wear and misalignment. What you should do instead is clean the tracks thoroughly. Wipe them out with a damp cloth to remove dirt and old grime, and use a rag with a small amount of solvent if there is built-up grease. Once clean, you can apply a very light spray of silicone-based lubricant or dry Teflon spray to the inside of the track and immediately wipe it almost dry, leaving only a micro-thin film that prevents rust but does not attract dust. The actual parts that need lubrication are the rollers, hinges, springs, and bearing plates, not the tracks themselves. Keeping tracks clean and dry is the best practice.