John, I don't know about the others, but I never placed much faith in the mirror for checking for any vehicle that is relatively close, at least when I am looking for someone that might pass on the left. I always do a head check as if I were riding a motorcycle, since it is so easy. My mirror is pretty much for looks, except for vehicles that are quite a distance behind, IMHO. The mirror is a help, but not a major one. If it weren't against the law, I would remove the pimple entirely. But, then again, I haven't had the car on the road since last year due to the weather, so I'll check it out later this month. I may rethink my position.
It has been raining up here off and on in Santa Rosa, CA for the past couple of weeks. Got down to 27 degrees last night and we even got some corn snow yesterday (I can hear the owners in the colder climes snickering). It rarely snows here, and when it does, it makes the front page of the local fishwrapper.
Barry