Cleaning and maintaining uPVC windows is easier than taking care of any other type of windows and doors. As they are highly resistant to any damage caused by staining, scratching, saline water, dirt and dust, they can easily be cleaned in a regular way with a dry cloth.
You can also mix a cup of vinegar with 4 cups of hot water and spray it on the windows and doors. Then, leave it on for 10 minutes and wipe it off with a clean, dry cloth to remove any excess liquid.