Is your car hiding a health hazard? Here’s what you need to know
Your car may look immaculate outside, but what is hidden within can be more troubling than you realise. If your car’s interior has recently been exposed to rain, spilled drinks, or has gone too long without fresh air, it might be harbouring an unwanted guest: mould.
Why does mould grow in cars?
It only takes a small amount of moisture – like a forgotten umbrella, damp gym clothes, or even condensation to create the perfect conditions for mould. Your car’s dark corners, fabric seats, and minimal airflow make an ideal breeding ground once moisture sneaks in. Even more concerning, many people don’t notice the issue until it starts to smell or until health symptoms appear.
Mac from The Valeters, a 5-star rated mobile car wash service in London, explains: “Mould loves warm, damp, and poorly ventilated spaces. Once moisture gets into the fabrics or padding of your car, it creates an ideal environment for mould to develop and spread.”
How dangerous is it?
Mould spores are microscopic and easily inhaled, especially in enclosed spaces like cars. They can cause respiratory irritation, allergies, or even worsen asthma – particularly in children or anyone with sensitivities.
If your vehicle has a persistent odour of damp, or if people in it experience headaches, itchy eyes, or coughing, mould is likely to blame.
Not yet persuaded?
From The Telegraph, we have just learned about how prevalent this problem is, particularly after damp periods. Mould can grow very quickly in unattended vehicles, even in cars that are in constant use, experts from various car care companies (including The Valeters) explained. Read more here.
Signs that your car has mould in it:
- Persistent earthy or musty smell
- Fogged interior windows
- Fuzzy spots visible on seatbelts, carpets, or upholstery
- Allergic symptoms that resolve outside the car
What can you do about it?
- Deep clean: Vacuum under seats, floor mats, and in crevices. Apply anti-fungal cleaners to all surfaces.
- Dry it out: Open windows, run the air conditioning, and use moisture absorbers inside the car.
- Fix the source: Check for leaks around windows, sunroofs, or door seals.
- Be careful about leaving items in: Wet clothes, bottles of water, and wasted food can all lead to mould.
When DIY isn’t enough
For more severe instances, or for peace of mind your best option is likely to be professional treatment. At The Valeters, we employ an ozone based process that eliminates odours and kills mould spores within the vents and hard to access areas. High-end auto detailers and car dealerships use the same standard of sanitisation.
How to avoid mould recurring
- Air out your car weekly (even in winter)
- Don’t store wet or damp objects within
- Keep your air-con on to avoid humidity accumulation
- Keep moisture absorbing products indoors, particularly in colder months
A clean car interior isn’t just a luxury – it’s essential for your health
Whether you’re commuting daily, running errands, or chauffeuring the family, a mould-free vehicle ensures every drive is safer, fresher, and more enjoyable.
