So dog jumped at screen of sliding glass doors--a nefarious lady was walking past carrying suspicious laundry basket--and dog knocked the screen door out of its tracks. Maintenance man was literally next door--said to put in a work order and he would get to it next week. I looked at Youtube videos (several--just google), and made a quick run to the local hardware store for a Phillips. (New apartment--no tools here yet.) Fixed slider in literally two or three minutes and am back in business. Not bad for a girlie-girl who didn't have a clue. Mwa-ha-ha!