Quick Formula from the KE Chemists:
1) Grab an empty spray bottle
2)Fill it 1/3 with white vinegar
3) Fill the rest up with water
4) Apply heavily to windshields & windows the night before temperatures drop
5)Be happy. No more ice to scrape and you won't be late for work!
Check out INSTA-THAW for the ultra-strength, multi-day protection!