The best overall maintenance of your blades is keeping them clean. No amount of cleaning will keep your blades in perfect condition. Wiper blades wear with each use. Most wiper blades will last about one year. When your blades become worn, dried, or faulty replace them with a new set.
Most manufacturers recommend replacing wiper blades at the beginning of fall.
If your car is a year or more old, a close inspection may reveal dirt build-up in the corners of your windshield and rear window around the trim. To remove this caked on gunk, use an old toothbrush or detailing brush with your spray cleaner. Before cleaning, lay a towel at the base of the window to catch drips. Spray your brush with window cleaner and shake off the excess cleaner. Use your brush to scrub along the trim, breaking loose the dirt.