The windshield wiper and blade assembly should be inspected periodically for damage, loose components and cracked or worn blade elements. Road film can build up on the wiper blades and affect their efficiency, so they should be washed regularly with a mild detergent solution. The action of the wiping mechanism can loosen bolts, nuts and fasteners, so they should be checked and tightened, as necessary, at the same time the wiper blades are checked. If the wiper blade elements are cracked, worn or warped, or no longer clean adequately, they should be replaced with new ones. Lift the arm assembly away from the glass for clearance. Working from the end of the wiper closest to the arm, pull the rubber blade element from the frame and discard it. To install a new rubber wiper element insert the end with the small protrusions into the replacement hole and work the rubber along the slot in the blade frame. For type B, squeeze the end of the wiper element and pull it out of the frame. Insert the end of the new element without cutouts into the end of the frame. Work the rubber along the slot in the blade frame until the cutouts are locked into place by the wiper frame claw.