Add two tablespoons of salt to clear water, stir well, and then soak a cloth. Wipe the glass surface with salt water, using the abrasive effect and antibacterial properties of salt to remove stains. Finally, wipe it again with a clean, damp cloth.

Squeeze a small amount of toothpaste onto a cloth and rub it directly on the glass. The abrasives and cleaning agents in the toothpaste can effectively remove stains and marks. After wiping, rinse the glass with clean water.

Mix white vinegar, Baijiu, and dishwashing liquid in a 1:1:1 ratio, then put the mixture into a spray bottle. Spray it on the glass surface, wait for a few minutes, and then wipe it off with a cloth. This mixture not only cleans the glass but also forms a protective film to prevent stains from reattaching.

‌‌For high-rise residential buildings, static mops and wipers can be used. First, use a static mop to wipe away dust on the outside of the glass windows, and then use a wiper to scrape off excess water and stains.