This has absolutely nothing to do technically with the mirror. What the heck do you guys do when washing the truck, you dry it off, and then drive 50 feet and all the water hiding in the main and bubble mirrors comes spitting out down the side of the truck? I've tried stuffing a towel edge back in there to wick some of the water out, but it's hit or miss, and a real pain. My Next thought was a 1/16 inch drill bit, and make a few holes on the bottom for the water to escape from. I'd drill from the rear to the front on an angle to make sure the winter crud doesn't get blown up and in behind the mirror heads. Suggestions? 
