If you have a stained glass window, it’s important to clean it as soon as possible. This will remove any dirt and stains that may have built up over time. To clean the window, start by taking off the protective film that covers the glass. Then, use a plunger to push all of the liquid out of the window. Be careful not to damage the glass surface. Next, use a vacuum cleaner to suck all of the dirt and debris out of the window. Be sure to turn off the vacuum cleaner before cleaning the glass surface again. Finally, use a cloth or a soft brush to clean any remaining dirt and debris from the window surface. Make sure not to damage the glass surface with your brush or cloth.