I was forced to brave the cold a bit early this morning, since the overnight drop in temperature had managed to ice over the windows of my personal transportation. I duly started the vehicle, turned the heater in the defroster mode, and pushed the button for the rear window defroster, knowing that soon my windows would be clear. The rear window defroster, being of the electric variety, had the window clear of ice and fogging within a minute. The front defroster, running off of my car heater, caught up about 5 minutes later.