The wiper blade and windshield should be checked on a regular basis for loose parts, damage and split or worn out blades. Dirt builds up on the wipers reducing their efficiency and so they should be cleaned with mild soaps frequently. The wipe mechanism can make bolts, fasteners and nuts to become loose hence its imperative that they are checked at the same time when checking the wiper blades. Broken, warps or do not clean properly anymore, require replacement of these components with new ones. Lift off arm assembly off glass; push release lever and slide them from the end of hooking arm. Join new wiper to arm. The connection is confirmed by the sound of clicking.