Forget world peace - this is what we really need

Lots of snow in the beautiful Laurel Highlands yesterday. Unfortunately, the ambient temperature was such so that the snow would melt on my windshield and then stick to the wiper blades in the form of ice, thereby rendering the wiper blades pretty much useless. I literally had to stop the car every 10 minutes to scrape the ice off of the wiper blades. So why can't they invent a heated wiper blade to prevent this type of thing from happening?