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How to Defog Your Windshield with Science, According to a Former NASA Engineer

Keep this trick in your back pocket.

flickr / accarrino

Of all the annoying things that come with driving in the winter, perhaps the most frustrating is when you get into your car ready to go, only to find you can’t see a goddamn thing. You might try defogging it, but you have no idea what will actually help. Hot air? Cold air? Who knows! What’s the best way to defog a windshield? Lucky for you, former NASA engineer and snowball machine gun inventor Mark Rober decided to figure out the best method for getting rid of that pesky fog.

To test out his windshield-defogging hypothesis, Rober puts his skills to work by utilizing the scientific method. First, he created a consistent environment that caused his windshield to be equally blurred for 10 days, so he could test 10 different methods. After the time was up, he found one technique got the job done in almost half the time required by the other nine methods. So if you wondering how to defog your windshield as fast as possible, the Robinator swears by this simple 4-step method:

  1. Turn your heat up all the way.
  2. Turn on your AC.
  3. Turn off your air circulation.
  4. Crack open your windows to let air in for a few seconds.


So next time you are running late for work and are ready to throw a Trump-level tantrum when your car is frosted, keep your as cool as your windshield and remember these four simple steps.

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