Overhead garage doors weigh hundreds of pounds, and doors that are not properly maintained or which are equipped with older automatic garage door openers can be safety time bombs. All too common are the tragic stories of garage doors injuring or even killing children or pets who found themselves underneath a closing door. Modern automatic door openers with auto-stop and auto-reverse mechanisms have greatly reduced such accidents, but mishaps can still occur if the door and door opener are not properly maintained.
Since most yards entertain play activity including baseballs and other sporting equipment, it's no surprise that garage doors experience broken glass from time to time. Regardless of the cause, it's important to repair glass quickly, since broken glass in a garage is a safety issue, a security problem, and an invitation to every bird and insect in the neighborhood to take up residence in your garage. Fortunately, it's not difficult to replace a pane of glass. The techniques are exactly the same as for replacing glazing in a house window.
I'm not a professional, but I watched as my garage doors were serviced last year. The tech used a spray lubricant (I had bought a different brand in the garage door section of a home improvement store). He sprayed the inside of the entire track, top and bottom, the rollers that ride along the track, and all hinges on the door. He sprayed each hinge twice -- once on each side. The techs were more generous with the lubricant than I was when I'd done it before, so don't be afraid to give it a good squirt.