The
internal glass runs commonly dry-rot and break apart, allowing the glass (w/o defrost E0TZ9842006B, w/defrost F2TZ9842006A) to rattle and squeak. The runs also commonly break away from their glue in the steel channels, and slide down inside the t/g, resulting in even-worse rattles. But they're very affordable, and easy to change. They should be glued in-place with either
Super WeatherStrip Adhesive or
E6000.
