Only had my "S" for about 6 weeks. Had my first extended driving for 3 hours in the rain today. First couple hours in rainy daylight, then in darkness. Both in light and in dark the rear view mirror gave such a distorted or camouflaged reflection of other vehicles that it was maybe only 50% as useful as any other car previously owned. Driver's side worse by far than passenger's due to the sweep of wipers pushing water off to the driver's side. Not related to inside fogging. It's all the water on the side window combined with the water on the mirror. Is both droplets (on mirror) and water flow (on the window). I can't really articulate or discern why the effectiveness so much less than prior cars I've had. No apparent film or anything on the glass. And they're fine in non-raining situations. Others note this and have any ideas? A little afraid to do a Rain-X application, don't know if that would help or be worse.