The answer to 'best way to clean window' is to use a microfiber cloth and a glass cleaner specifically formulated for windows. Start by dusting the window with the microfiber cloth to remove any loose dirt or debris. Then, spray the glass cleaner directly onto the window and wipe it clean using the microfiber cloth. This will leave your windows streak-free and sparkling. Be sure to clean both the inside and outside of the windows for best results.
For tough stains or hard water buildup, you can also use a squeegee to remove excess cleaner and water. Squeegees are especially effective on large windows. Always clean windows on an overcast day or in the shade to prevent the cleaner from drying too quickly and leaving streaks.