Vinegar is probably the most common and the most effective cleaning agent. Follow the steps mentioned below to wash the windows.
Dust the windows using a rag. Then, take a microfibre cloth and wipe the windows with a little pressure to get rid of the dust effectively.
Prepare a solution of 1/2 cup water and 1/2 cup vinegar. Fill a small spray bottle with it and spray liberally on the windows.
Take a lint-free towel and scrub the windows. Work quickly to avoid the formation of streaks.
Take a clean microfibre cloth to wipe the window dry.