Driver's Rearview Mirror not defrosting
 

My driver's side rear view mirror has recently stopped defrosting when I turn on the defroster for my rear window. The passenger side defroster is still functioning. I've been searching for a fuse that would be related to this without success. Anybody out there had this issue and fixed it?
This is in my 2008 535i.

Thanks, Dave.

At a guess, both mirrors probably use the same fuse, so if one is working the other should be getting power still. Probably the heater in the glass has failed. Older models left the mirror heaters on at all times (my E30 and E34 did). I've never noticed whether the E60 switches them with the rear defroster. Smarter every day, I guess.

Replace the glass. That is what I had to do and it solved my issue

And prepare for big bux if you have auto-dimming outside mirrors.

Thanks everyone for the bad news. Yes, I've got the auto-dimming mirrors. Maybe I'll just put up with the fogged up mirrors as they aren't much of a problem in California.

I was wondering about that.

Around here in the Great White North, frost is a PITA and the E60 mirrors are too small for my scraper. I'd search for a mirror off a wreck before I'd pay stealer prices for a bit of glass.