How To Keep Your Car Windows Frost-Free

How To Keep Your Car Windows Frost-Free

For the past two months, thousands of Australians have been waking up to the same tedious morning ritual: removing frost from their car windscreens. Here’s a simple ice-banishing hack that will allow you to sit back and enjoy a coffee before beginning the daily grind.

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The winter solstice may have come and gone already, but you’d never know it from the weather. It was a chilly two degrees in the lower Blue Mountains this morning, resulting in a thick layer of frost covering every car on the street. Every car except mine, that is.

After a month of faffing about with squeegees and jugs of hot water, I decided to take preventative measures the night before. This involved hanging my windscreen sun protectors on the outside of my car windows. This acts as a protective layer that prevents frost from forming. Simple, no?

If you don’t own any sun shades, you could also try spraying your windows with a mixture of water and vinegar or rubbing alcohol at night. The solution can also be used to speed up the defrosting process on the mornings you forget.


  • I used to just place a towel over my windscreen tucked under the windscreen wipers. Now my car has a carport to live in and I don’t have to do this any more.

  • Don’t use hot water temp or luke warm will do the trick. Hot water could potentially break the window due to the extreme temp variation on the glass from freezing to hot in an instant

  • I just keep a bucket of tap water next to the car for the next morning. Warm / hot water is bad as it can cause cracking I believe (heating up something frozen rapidly is bad news).

    So any running water will act as a way to dislodge the ice from the windscreen, and/or heat it up to the waters temperature (above 0, so that it is melted).

    This won’t work as well in much colder environments, but away from the snow in Australia it does fine even on mornings that are sitting at 0 (leave home around 5:45).

    One trick though, is that the water can refreeze, or not get rid of a bottom level of ice, so i found having the car on, and wipers running the second after I splash the water helped prevent this, and any small layer of ice left could be removed by heating up the windscreen using the A/C from the inside (demister) and just running the wipers for a bit.

  • A towel on th windscreen stops it icing up, as does any covering, seemingly no matter how thin.
    An old towel or blanket certainly does the trick if you pop it on the windscreen the night before.

    • Note the use of the word “squeegee”. I wasn’t just pouring hot water onto my windscreen. It’s comparable to rubbing the windscreen with a cloth soaked in warm water — not enough heat to cause any cracks.

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