- White vinegar
- Newspaper, crumpled
Fill spray bottle with 1/4 cup of white vinegar then fill to the top with water. Shake bottle to combine. Spray on the surface. Rub with a lint-free rag or a torn and wadded up newspaper page.
For outdoor windows, use a sponge and wash with warm water with a few drops of liquid castile soap in it. Rinse well and squeegee dry.