You can’t buy a car these days without a rear window defroster– the little built-in electric heaters that melt ice and frost off the rear window. You push a button on the dashboard, and the ice just melts away, no scraping required.
Why is it, then, that to clear the windshield, you have to rely on a combination of warm air blowing on the inside of the glass, and scraping crap off the outside? Why don’t they build little electric heaters into the windshield, which would make life much easier for those of us in cold areas?