This is a test of commonsense. Complete the next sentence:

How to maintain your electric garage door
Clean your metal garage door regularly.
Using a mild detergent and a soft brush, clean your garage door several times a year. This will remove any corrosive chemicals or dirt on the garage door that may prevent it working in top condition.
In addition, cleaning it in this way will allow you to see if any springs or hinges need repair. Proper cleaning of your wooden garage door with a mild detergent and soft brush will remove any chemicals or sediment that may threaten to warp the garage door and inhibit its proper operation.