Source: Pella | Repost Fadely 4/12/2023 – 
How to Clean Your Windows on the Interior and Exterior
To get started, you’ll need a simple glass cleaning solution, which can be made using supplies you probably already have at home. Here are some easy recipes:
Soap Alternative
- 1 teaspoon liquid soap or infant shampoo
- 1 quart of water
Vinegar Remedy
- 1/2 a cup of vinegar
- 1 quart of water
Keep in mind, some hardware coatings can be harmed by vinegar.
Once you’ve created your solution, follow these steps to properly clean your glass.
- Rinse the surface thoroughly with clear water.
- With a sponge, soft brush and your preferred soap or vinegar solution, clean laterally and then vertically while applying even pressure.
- Rinse right away with clean water (sponging may be useful while rinsing; avoid letting the cleaning solution sit in puddles or dry on glass or frame/sash surfaces).
- Dry off with a dry, lint-free towel.
- Repeat the previous steps as required to get clean.
- Dry the window sill and frame with a different towel.