Hand wash only, air dry...

When I was working at a major car plant in the late 60's they installed a new automatic car wash on the property. All of their production had the windshield antenna so they did not include the system to go around the antenna. When it was finished all the contractors lined up to get a "free" car wash. The 7th or 8th car/truck was in the wash by the time word got back that it was snapping off all the antenna's. Sure car washes do occasionally snap off an antenna. They are made to break off easily, but I have never seen one tear the mount off of the fender.