RainX. The stories are true. It works, and it’s easy to apply. First, wash your windows with Windex. Cleaning with a glass cleaner is preferable to a car wash because the water takes way longer to dry, and part of the whole point of this exercise is to avoid the effects of water on bare glass. Then apply as shown in the video.
Get it at Canadian Tire. For those scraping ice off their windows in the mornings, it makes ice way easier to scrape off too. You have to see it to believe it.