If you really want to save time and money, a glass cleaner made of pure water would work. But for a perfect result with less effort, you can test the following recipe:
This window cleaner contains just the necessary ingredients:
- Water and vinegar dissolve the dirt and scale.
- Alcohol sanitizes the surface (strong antiseptic action), and facilitates the product evaporation, for a clear and shiny finish!
Reuse an old spray (chose the ones that can be opened, some are sealed!) forever =)
Any towel will work, but micro-fiber sheet will better fix the dust and impurities.
Precaution: This product, may make your hands dry, because of the alcohol. To avoid this, use gloves.