I read somewhere that you can clean your stove window glass with ash. Dampen a paper towel with water, dipping it in ash and rubbing it on the window residue. Then just wipe dry with a clean paper towel. I had to try it, and I was amazed at how well it worked. It worked better than the ten dollar bottle of Meeco Red Devil that I bought. Have you guys tried it? I know ash with water makes an alkali, so that must be why it works so well?