Windows should be inspected for the following:

Broken panes: Broken panes should be replaced.

Caulk and glazing: Check caulk around windows for cracking and deterioration, and repair as necessary. Check glazing around window panes and repair as necessary.

Window operation: If hinged window panes stick, they may need to be sanded. If storm windows are in a track, use silicon spray to help keep them from moving freely (after cleaning).

Window hardware: Replace broken, worn, or missing hardware. Tighten and lubricate door hinges and closers, and window slides.

Clean cobwebs and debris from around window frames. Clean windows with an ammonia solution or window cleaner. Do not clean windows while in hot direct sunlight, or the cleaning solution will evaporate quickly causing streaking.