Sunday 6 November 2022

Use cat litter in tights to help prevent car windows fogging up!

Yep, this makes sense. First thing is that, in the UK, if you are driving with fogged up windows it is illegal. The Road Vehicles Lighting Regulations 1989 regulations 23 and 27 and the Highway Code state that 'windscreens and windows must be kept clean and free from obstructions to vision'.

Cat litter in tights can help reduce condensation on car windows
Cat litter in tights can help reduce condensation on car windows. Image: MikeB.

That does not mean that you'll be nicked for this minor crime, but it is possible. And if it happens you could be up for a £2,500 fine plus 3 penalty points. If the fogging causes an accident, you could commit a much more serious crime. It is dangerous to drive with a partly fogged up windscreen. 

Secondly windows fog up in cars because of condensation. Evaporated water in the air from damp clothes and objects such as wet umbrellas and the breath of the passengers and driver condenses on the cold windows. This converts the moisture in the air to liquid water on the window.

Wet dogs come to mind. There are a lot of wet dogs jumping into the back of estate cars at the moment. I am sure they are the cause of a lot of fogging.

Thirdly, you can help prevent this annoying condensation by filling some women's tights with clay cat litter and placing it in the car ✔️👍. Clay based litter is sodium bentonite, a highly absorbent material which is why it can be dangerous to cats if it is very fine and the cat breaths in the dust particles. The particles become a ball of clay inside the cat's lungs. Highly dangerous.

Watch out for clay-based litter with is too fine. It is light but I say it is dangerous.

As cat litter is designed to absorb liquid (urine) it will absorb some of the moisture in the air that is trapped inside the car. It may help in reducing the fogging.

You can buy commercial products that are better looking which contain absorbent materials which do the same thing only you need more money I suspect.

Here is an example available in the UK:

Car dehumidifier
Car dehumidifier. Image: Amazon.

Perhaps some cars have dehumidifiers!

In the era of the so-called cost-of-living crisis in the UK, cat litter will be cheaper only make sure it is the unused variety!

Another possibility would be to leave the doors and windows open after you return for a while to allow the moist air inside the car to be removed by drafts. This could work if you have a garage.

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