The most common causes of breaking down a sliding glass door are extreme temperatures, moisture, and poor maintenance. If you live in a cold climate, then you should make sure that you keep your sliding glass door closed at night. If you live in an area where there is a lot of humidity, then you should make certain that you keep your sliding door shut during the day. Also, if you don’t clean your sliding glass door regularly, then you could end up with mold and mildew buildup.