The blade and windshield wiper package should regularly be checked for damage, loose parts and broken or worn blade members. There is a buildup of road film on the wipers which can reduce their effectiveness, hence, they should be cleaned with a mild detergent solution every now and then. At the same time as checking the blades, one must remember to tighten these fasteners since wiping action, for instance, may loosen bolts or nuts with time. In case any of the elements are found to be cracked, warped or not cleaning enough anymore; it is better to get them substituted with new ones. Lift away from glass (for clearance) arm assembly by pressing release level then slide out wiper blade assembly from hook at end of arm Depress release lever and slide wiper assembly down wiper arm & over hook at end of arm Attach the new blade onto arm. An audible click will prove that connection has been done.