The answer to 'how to clean window' is to use a window cleaning solution and a microfiber cloth or squeegee. Start by dusting the window sill and frame to remove any dirt or debris. Then spray the window cleaning solution onto the glass and wipe it down with the microfiber cloth, using a circular motion. For best results, use a squeegee to remove any streaks or excess solution, wiping the blade clean after each pass. Avoid using paper towels or newspaper, as they can leave lint or ink behind.
Cleaning windows regularly, every few weeks or months, will help keep them looking their best. If you have hard water stains or other difficult buildup, you may need to use a more specialized cleaner or call in a professional window cleaning service.