It is normal that after using your overhead sliding door for a long time, most of its parts will wear down or get damaged. If you want your sliding door to last even longer, you will need to maintain it regularly, and the main area to keep checking and repairing every often is the track. Never let the track get completely damaged. Fix the dent sections by straightening them using pliers. Tighten the screws of the overhead track using a screwdriver to avoid movements that can lead to further damage.