You have a choice:
Scrape the windshield to remove the snow and ice, or let BlueHeat® do it for you. Without BlueHeat® you need to be outside in the cold, walking around on slippery ground, reaching over the dirty, snowy vehicle to try to scrape off the ice and snow accumulated on the windshield and windows.
That is why using BlueHeat® to defrost your windshield and windows is the smarter alternative to scraping - you need only to climb into your vehicle and go!