The elements of the wiper and blade assembly which are windshield should be regularly assessed for broken parts, loose components, and if cracked or worn out. Therefore, wipers need to be washed with a mild detergent on a regular basis since road films may accumulate on them resulting in their ineffective operation. As the wiping mechanism moves back and forth it can become loose causing bolts nuts and fasteners. Accordingly, when examining the condition of the wiper blades any necessary tightening of these must also take place at that time. The only solution in case the blades have been warped, worn or damaged is replacing them with new ones. Raise the arm assembly above the glass to clear then press down on release lever before pulling back entire wiper blade assembly out from end hook of arm. Thus to separate it from this arm you must push onto release pin and pull backwards on it so as to remove it while making sure not touch your finger's sharp edge to avoid injuries. Attach new wiper blade unit to this one's insides as guided by an audible click sound telling you that connection has finally been made through this step by step process!