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I don't but... I do remove the clear covers front and back to clean the inside of the cover and give the plates a wipe while they're looking at me. I can't stand the soapy drips that show after a full wash. Totally normal as I see it...
i think the risk is more in the metal screw into the plastic fitting. there are only so many revolutions you'll be able to do that before the grommet fails.