I'd be concerned about the dash, if it's on the passenger side, that would be where the airbag is, maybe the heat or direct sunlight has softened the plastic, warranty for sure, or get a sun shade, the trim on the back is going to fade, however if it's greying, that would be excess soap build up, there is a trim cleaner available from McGuires, or your Mopar accessory dealership sells it as well.