I don't know if that would do anything for it or not. I'm thinking not. I'm also thinking hot and/or boiling vinegar isn't something I'd care to be around.

I know the time and effort from actually scrubbing it doesn't sound like fun, and it won't be, but it will get the job done and there won't be any risk associated with it. Good luck and let us know how whichever process you use works out.