If you have overspray on your glass, there are a few ways to clean it off. The most common way to clean overspray is to use a vacuum cleaner with the hose attachment. This will suck the overspray off the glass and leave it clean and clear. Another way to clean overspray is by using a hairdryer. This will heat up the air and cause the overspray to break down and come off the glass. Finally, you can use a bucket filled with water and pour it over the area where you oversprayed. This will help remove all of the overspray from the glass.