Yeah that happens on the heated mirrors eventually. Well, sometimes.

I had an older model lexus with that issue. I replaced it with an aftermarket mirror which didn't have the defroster. Idk if that's an option here. Another time replaced a broken one with a used one from a auto recycling yard.
Not sure on options for either on this car though, just throwing it out there.

 

Thanks, appreciate it!

 

theres no warranty fix for this?

 

Mine is a 2014 and out of warranty. I would hope that it would be a warranty fix for those still with it!