Wiper blades on your vehicle should be checked and replaced every six months if the blades show any signs of deterioration. Replacement windshield wiper blades are available from any auto parts store. You'll need to ask the store clerk what size fits your vehicle. They can normally look this up on in-store computers. Once you have your new wiper blades, you'll need to know how to fit new wiper blades onto your factory wiper arms.
Orient the new wiper blade with a universal mount so that the bottom of the "U" on the wiper lock is facing the wiper arm hook.
Slide the bottom of the "U" on the wiper blade into the wiper hook until the wiper snaps into place. Some universal mount wiper blades do not use a retaining clip. In these cases, friction will hold the wiper blade in place.
Swing the wiper blade so that it is parallel to the wiper arm and then lower the assembly to the windshield.
Orient the replacement wiper blade so that it slides onto the pin on the wiper arm. The pin-type assemblies will only slide on one way.
Slide the wiper blade onto the pin until the assembly clicks into place, locking the wiper blade to the wiper arm.
Swing the wiper blade assembly back against the wiper arm and lower the arm and blade to the windshield.
Push down on the retaining clip on the end of the wiper blade using a pair of needle nosed pliers.
Pull the rubber blade out of the end of the wiper blade assembly.
Continue to hold the retaining clip down with a pair of pliers as you slide the replacement rubber blade into the wiper blade assembly. Slide the replacement rubber blade all the way into the assembly until it will not go any further and then release the retaining clip on the end of the blade assembly.