You would never think about not changing the oil and filter in your car, yet virtually all the doors we work on have never had any maintenance performed. If you have a chain-drive automatic garage door opener, the chain should be lubricated every 6 months with typical use. Sensors should be cleaned, aligned and tested for safety. Similarly, springs get weaker over time and they may need to be adjusted to ensure that they are neutralizing the weight of the door - preventing premature damage to the opener. A qualified garage door technician should tighten bolts, inspect for frayed cables, adjust the force settings and other routine preventative maintenance.