I have been a sign painter for over 50 years and in those years have Gold Leafed many windows. (Glass) The Best and Only way to super clean glass is with
Bon Ami Glass Cleaner. I also prefer the cake style
Bon Ami (like a bar of soap) but you can also get it in the Powder version. You can still get it in the older family hardwares. One cake of
Bon Ami will last you and your grandchildren a lifetime.
Good Luck on your "Clean Glass".
