If your wipers aren't frozen to the windshield, does this do anything? The description in the manual is puzzling: "This feature is used to prevent ice from building up on the windshield and wiper blades." For one, it says on the windshield, but unless I'm mistaken it only works on that small incidental bit of windshield where the wipers are parked (below the driver's field of vision), so yes, technically ice is being melted on the windshield, but not the part we need to see through during driving. Secondly, to prevent ice from building up (rather than remove ice that has already frozen the wipers)? Is there some issue where previously free wipers can suddenly stick to the car while you're driving? How does this prevent ice from building up?
