Can be used on fire place glass just make sure its cold.
Try just using a smaller amount, about the size of a quarter. It has a slightly greasy feel but if you don’t use a lot and use paper towels to clean up I think that’ll solve your problem.
I'm thinking yes as far as cleaning the glass. It does leave behind a surface coating however (I think it's silicone-based, but not sure) that you may not want to have baked into your food???
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