Most garage doors come with glass windows that are prone to breakage. You never know when you will need to replace your garage door window; hence, preparation is highly advised. The following is a systematic guide on how to replace a garage door window. Disconnect the garage door from the power supply by unplugging the garage door cable. This is a safety precaution. Get rid of all the loose and broken glass around. You do not want them lying around. In case there is glass on the windowpanes, get rid of that too. You should have latex gloves on when…