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How to stop condensation in your car

Condensation written on a car

Let's demist-ify this confusing issue that crops up every winter.

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What causes condensation in my car?

Condensation inside your car happens when the temperature inside your vehicle is different from the outside.

Warm air from inside the car meets the cold windscreen and turns water vapour into actual water.

This causes that pesky windscreen fog that impedes your vision.

During a journey the driver and any passengers’ breath can cause condensation, but it can also build up overnight.

You might even be plagued with condensation after successfully de-icing your car.

And when you’re in a hurry in the morning, the mess of dials and switches on your car’s heater only adds to the confusion. 

Not only is car condensation a pain, but, if it stops you getting a clear view of the road, it’s also illegal.

This means you could wind up with a fine and points on your licence. This in turn could hike up your car insurance costs.

Find out how you can stop car windows steaming up inside with these tips.

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How can I get rid of condensation quickly?

  • Wash your car to get rid of dirt particles that attract moisture.

  • Get rid of any damp items like coats and towels

  • Fill a pair of tights with cat litter and leave in your car - a quick and easy car moisture absorber. Trust us on this one.

  • Air out your car by leaving the windows open for a few hours (when safe to do so)

  • Switch on your blower and A/C, and wipe down your windows. 


How do I stop condensation inside my car?

First thing's first - clean your windows inside and out.

Moisture tends to cling to particles of dirt, so a grubby window is a haven for condensation.

Use a cleaner that's designed for car windows, and polish them with a clean microfibre cloth. Some newspaper might do in a pinch.


Check prices for microfibre cloths on Amazon
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Do wet items in the car cause condensation?

Leaving damp and wet things in the car can also contribute to condensation.

A wet dog towel or a soggy umbrella creates moisture in the air as it dries out, giving you more mist.

Remember to always take them out when you leave the car. 

A blocked pollen filter, which cleans air entering the car, could be another possible cause.


How do I get rid of excess moisture in my car?

One method that could work is to find a car moisture absorber. This can be anything that’s designed to absorb excess moisture from your car.

This could range from a portable dehumidifier to a dehumidifier bag, filled with silica gel. Some motorists even swear by cat litter in an old pair of tights.

Letting the car air out when you can might also help. So, if it's dry and you're able to leave the windows open for a while, then do. 

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What blower settings do I need to demist my car?

If you're in your car right now and it's full of condensation, it's important to clear it up before you drive away.

Here’s how you demist your car fast:

  • Set your blowers to full, but keep the temperature cold at first. Point them at the windscreen and windows.

  • If you have A/C, switch it on. This will help keep the air dry.

  • If your car has a heated windscreen, switch it on.

  • Increase the temperature until the windows are clear.

It's important not to let your engine idle while you're away from the car, as you could get a fine for doing so.