Heated Ice Scrapers
One of the most disappointing things about cold winter days is all the ice you have to scrape off your car just to go to school/work/extra-curricular activities. Not only is this a pain for myself to do, but when I get on the road, I see many new, inexperienced drivers who are just too lazy to scrape more than two square centimeters off their windshield, which poses an immense safety risk to anyone driving.
In order to decrease the happening of this, I propose a heated ice scraper. It wouldn't be heated by electrical use, as I'm aware of the dangers that the melted ice would have when combined with electricity. Rather, an exothermic process referred to as "slaking lime" would be used to generate the needed warmth.
In the process of slaking lime, Calcium Carbonate (CaCO3) is superheated, which causes it to release CO2 and Calcium Oxide (CaO). Packets containing Calcium Oxide and its reactant, water, in separate sides of a plastic, non-reactant package. When someone wanted to add a quick boost of heat to their defrosting efforts, they would break the package, as one breaks a glowstick. This would produce Calcium Hydroxide (Ca(OH)2), as well as a useful amount of heat.
Reward: You Decide!