How to stop your car windscreen freezing on the inside

Now that the cold and wintery weather has set in, you will have noticed your car covered in ice.

This will likely mean an extra ten minutes will need to be added to the morning routine, to ensure that your vehicle’s windows are clear – and you are safe to drive.

All car owners would have experienced this, and know how to sort it. However, when the ice appears on the inside of the windows, it can be a more difficult issue.

This guide looks at why it happens, what preventative measures you can take, and how to stop your car windows freezing on the inside.

What causes car windscreen to freeze inside?

The reason why you are seeing the inside of your windscreen freeze is due to humidity in the car.

High humidity in the vehicle, mixed with a cold surface caused by outside temperatures, will likely lead to a frozen windscreen.

When warm, moist air comes into contact with the glass, condensation forms and then freezes.

This is a common issue in vehicles of all ages, makes and models – so knowing what to do in this situation is very important.

How to stop car windscreen freezing inside?

Preventing the inside of your car windscreen to freeze during the winter months is an integral part of regular car maintenance.

Make sure you add it to your daily/weekly schedule to keep your vehicle in the best condition possible.

To reduce the chances of your interior windscreen freezing, ensure your car is well-ventilated. This is especially important for cars with sunroofs – due to the added surface area for the condensation to freeze. Open windows whenever it is possible and safe to do so.

Doing this will balance out the difference between the inside and outside humidity.

There are several ways to do this, which are listed below – along with some other helpful tips.

Moisture-absorbing products

There are many types of products, like silica gel, that you can leave in cup holders and side pockets in the vehicle that will absorb moisture.

These can be found is most DIY shops and online, and are a cheap option for cars, homes, garages and anywhere where water build up and mould commonly appear.  

However, be sure to leave them out of the reach of children.

Remove wet items from the car

For any sports, walking, and dog walking enthusiasts, there will have been countless times where you would have wet clothing, shoes, towels, and other items in your vehicle.

Leaving them in there will not only lead up to excessive moisture – but will also make your car smell pretty bad.

Be sure to remove the wet items – and pets – as soon as possible and remember to wipe the internal parts of the vehicle dry.

Check for any water leaks that might contribute to humidity

If you have carried out these instructions and you are still having issues – then you could have a leak in your vehicle.

Water that enters your vehicle through cracks, damage or poor manufacturing can lead to a build-up of moisture.

In many cases, you will not be able to fix this issue yourself. If this is the case, take your car to your local trusted garage.

Regular cleaning

Clean the interior surfaces, as dirt and grime can hold moisture. Wipe down windows and surfaces regularly to ensure there is nothing to freeze.

Knowing how to properly clean your car is important for all car owners.

Anti-fog products

Apply anti-fog products to the interior of the windscreen to reduce condensation and to add a layer of protection to the surface.

Products like this can be found at RAC Shop.

Use sun shades

If where you park your car is exposed to the elements of winter – as well as sunshine – using a sun shade will help regulate interior temperatures and reduces moisture build-up.

In other cases where you leave the car for an extended period of time, vehicle owners can also use car covers.

Other tips for winter driving

Here at the RAC, we have many helpful guides that tackle everything you will be facing this winter.

With heavy rain, winds, ice, snow, and many other challenges, it is important to be ready for the colder months.

Get ready for winter driving here.

If you have any questions about windscreens and any issues you are facing this season, leave them in the comments below.

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