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05 Dec 2019
Adam Bate

How to stop condensation in your car


Window covered in condensation with how to stop condensation in your car written on it

Let's demist-ify this.

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Condensation happens when the temperature inside your car 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.

And the mess of dials and switches on your car’s heater only add to your confusion. So how can you stop it?

Are you in the car and need to get rid of condensation right now?

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Quick fixes to prevent condensation

  • 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 - this will help absorb excess moisture. 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 to fight back against condensation

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 will do in a pinch.

READ MORE: Are you de-icing your car wrong?

condensation on a car window 

Remove damp items and check your filters

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, can be another possible cause.

READ MORE: How to drive in wet weather

Soak up excess moisture 

One method that can work is to keep something in the car that will absorb moisture.

Some say that cat litter in an old pair of tights is a great way to do this. You can also get a portable dehumidifier that'll collect any extra moisture in the air.

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

Check prices for dehumidifiers on Amazon

Use your heater and demister

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.

Use this quick checklist of the right settings to use when demisting your car: 

  • 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 heated windscreen settings, switch them on.

  • Increase the temperature until the windows are clear.

READ MORE: Dashboard warning lights explained


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