Periodically inspect the windshield wiper and blade assembly for damage, loose parts, and cracked or worn blades. Wiper blades may collect road film which could reduce their efficiency thus they should be washed using a mild detergent occasionally. When you are checking on the wiper blades, examine bolts, nuts, and fasteners that can become loose as a result of the wiping action. In such cases where some cracks appear in the wiper blade elements resulting to their warping, wearing out or inability to clean properly anymore, replace them with new ones. Involve lifting up the arm assembly so that it does not touch glass while taking care of space allowances; finally release lever is pushed down then slide forward hooking lever. Put the other wiper on this part of the arm. It is connected if there is an audible click.