Soak the cloth, squeeze out any excess moisture, and then start wiping the glass. Remember to wipe it up, down, left, right, and not leave it in any corner. When wiping, apply even force, don't leave one area shiny and the other gray.

After wiping it once, you may see some watermarks on the glass, at which point the glass scraper comes in handy. Use a scraper to scrape from top to bottom, from left to right, slowly removing all the watermarks. If you don't have a scraper, you can also use a dry cloth to wipe it again, but remember to be gentle and not scratch the glass.

Finally, it's about checking the work. Stand further away and check if all the glass doors have been wiped clean and if there are any missing areas. If there is, just wipe it again. Until you are satisfied.