Wiper and blade assembly to the windshield must be checked frequently in case of damage, loose parts, damaged and worn parts of the blade. The wiper blades may accrue road film and thus interfere with their performance hence they are to be washed frequently using a weak solution of a detergent. The wiper blade elements should be replaced with new ones in case they are cracked, have been worn-out, distorted, or are no longer cleaning satisfactory. In the case of early models, detach the arm assembly by lifting it out of the way of the glass, by pressing the release lever, and sliding the wiper blade assembly out of the arm hook. In later models, clearance is achieved by lifting the arm assembly out of the way of the glass, then locking the buttons together and then to separate the wiper blade assembly and the wiper arm. Connect the new wiper to the arm by ensuring that there is an audible click. Regarding the rear window wiper blade on the early models, one will have to raise the arm assembly off the glass, turn the blade upwards and then draw the blade out of the wiper arm. On subsequent models, remove the wiper arm off the glass then with a plastic trim tool, pry the blade off the arm. Installation To install, position the slot of the wiper blade and align it to a pin on the wiper arm and push it until fitted.