Because rubber deteriorates over time, you’ll have to replace your windshield wipers at some point, even if you don’t use them that often. Natural rubber windshield wiper blades typically last for up to six months, but you may be able to stretch that out for a few more months by checking them regularly for wear and tear. Synthetic wiper blades, which deteriorate less rapidly than natural wiper blades, can last a year or longer. As with natural rubber blades, you should check them after the year is up to ensure they aren’t ripping or tearing.