See also:

Wiper Blades
Check the condition of the wiper blades at least every six months. Replace them if you find signs of cracking in the rubber, areas that are getting hard, or if they leave streaks and unwiped areas ...

For Safe Driving
The following pages explain your vehicle's safety features and how to use them properly. The safety precautions below are ones that we consider to be among the most important. ...

Checking and Maintaining Wiper Blades
Checking Wiper Blades If the wiper blade rubber has deteriorated, it will leave streaks and the metal wiper arm may scratch the window glass. ...