The best way to judge when your blades need to be changed is to look for streaking of the water being wiped away or for chips and breaks along the points of contact. These are the best indicators of the need for new blades.
How do you Change Windshield Wiper Blades on a 2004 Chevrolet Trail Blazer?
Change the wiper blades.
Experts say windshield wiper blades should be replaced every six to twelve months, and wiper blade manufacturers recommend changing wiper blades every year.
Yes, the Avalons were manufactured with wiper blades, what about them?
http://www.ehow.com/how_4454148_replace-wiper-blades-toyota-corolla.html
Replace your wiper blades whenever they stop cleanly removing water from your windshield. You can keep them in good shape by occasionally wiping (Cleaning) them with a cloth with rubbing alcohol on it.
To fix windshield wipers on a Volvo 940 try using new wiper fluid and cleaning the windshield and wiper blades before you replace the blades. It is also important to replace wiper blades regularly.
Fit new wiper blades.
motor is working but wiper blades do not move.
The 2000 Pontiac Bonneville takes a 22" wiper blades on both sides front. However, when buying windshield wiper blades be sure to always use the application guide book at the store. The replacement wiper blades will come with step-by-step, illustrated instructions.
The 1993 Mercury Villager takes 22" replacement windshield wiper blades on both sides front.
Windshield wiper blades are made of mostly of silicone rubber. They are made to glide over the surface of the glass and not create smears on the screen from sticking.