I was thinking about doing a little project where I add heated mirrors but only if there's an easy to take apart the mirrors. I dont mean removing them from the doors. I mean taking the actual mirror itself apart.

 

Rd1/2 there's a plastic backing plate that pops out with the glass.. try and get a finger behind it in 2 corners so you don't bend it too much

 

Yours don't have a small heater already?