It's a dilemma every driver faces, how to quickly defog your car windows, especially in cold weather.
Now, a former NASA engineer is out with a YouTube video offering you some tips on the fastest way to clear your car's windshield.
After a bunch of experiments Mark Rober has come up with a quick four step method involving several settings on your dashboard.
First of all turn your heater on full blast, then turn on the air conditioning, make sure inside air circulation is off, and finally crack your windows for a little bit.
Rober says he decided to conduct his experiment because one of the worst things about driving a car in winter, is when you're late for work and your windows are all fogged up.
Watch the video here