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when will the producers tell the cameramen to wipe off the lenses??
...zap!
I thought that some of the cams (in the turns, especially) were not operated by a person directly, hence the always wet lens. That said, if they can clear the lens on a car getting hit with rubber and moisture going 190+, then they can surely clean the lense on a camera sitting stationary in a corner, if indeed they are truly remotely operated.