Windshield and rear window wiper and blade assembly ought to be periodically inspected against damage, lost parts and broken and worn blade components. The wiper blades may accumulate road film on them which may interfere with its efficiency hence they must be washed with a light solution of detergent often. When inspecting the wiper blades, the wiping mechanism can also loosen bolts, nuts, and fasteners and check them and tighten them where needed. In case the elements of the wiper blades are broken, torn, or distorted, they must be changed to new ones. In order to change the blade, position the arm assembly so it is clear of the glass and unscrew the blade by lifting the release lever. Take a needle nose pair of pliers and pull out the retaining clip followed by the blade element. Insert the new blade element and fix the retaining clip. Lift the release lever and slide the blade element pin into place until it clips into place. Lastly, wiper arm nut: narrow down to check whether it is tightened or not.