How do I remove foggy film on old glass?

Was the glass ever clear? If it was made to be frosted glass, I believe the glass was etched using a chemical process. I don’t know think you can buff that out.

If it is just mineral/calcium deposits on the glass, try soaking it in CLR and see if it loosens the deposits.

I hope that helps

😊

I use these microfiber clothes to clean all my windows and they work great - removes fog and no streaks. https://amzn.to/2MJsZcC

Carrie, Hello. There is a problem with the seal on the glass. It's getting moisture between the glass. If your doing a DYI, I. suggest you find different glass for your project. You didn't say what you were doing with the glass. Aloha!