In 1903 a real estate developer named Mary Anderson invented the windshield wiper. She would not be happy if she saw how many people neglect her incredible useful device today. Not changing out your wipers when you see them starting to wear and fray can be a major safety concern. Worn wipers lose their effectiveness and can scratch your windshield permanently and, more importantly, lead to traffic accidents due to decreased visibility. If you live in a snowy climate, make sure you clean the ice off your windshield completely and let it defrost instead of using your wipers to scrape it off as you will undoubtedly rip the wiper blades, costing yourself more money. Here is a video showing you how to change out your wiper blades.