Quote from Beverly in The Circle of Driving Again
Murray: Wait, if the clamp gets wet, doesn't it get rusty? Beverly: Of course it gets rusty. He works around water and metal. That's why he wears a bag over the clamp. Murray: Ah, come on, there's gotta be a better way to clean pools than a homemade clamp with a bag over it. Beverly: He's a very determined man!