Do Diluted Detergents and Soaps Still Work? | Cheapism.com
"Diluted dish soap can be used to clean glass surfaces, and it's the best one to use on really dirty glass," Berliet says. "Try using diluted dish soap to thoroughly clean glass before going back over the surface with a glass cleaner to shine it up. If you use a squeegee with your dish soap on a glass, then glass cleaner may not even be necessary."