The source describes a homeowner repeatedly washing the glass while postponing the dirty window tracks. Channels and corners can retain months of debris even when the main pane looks clean. Treat these areas as a separate part of a deeper window-care session.

Include Neglected Window Tracks in a Deep Clean

Inspect the frame construction and remove loose material before introducing moisture. Use a narrow soft tool suited to the channel, avoiding damage to seals or finishes. Finish by collecting loosened dirt rather than leaving it to settle back into the recess.

Clean panes do not remove the dirt gathered in the frame channels.