How to Remove Mould From Car Seats

You can remove light surface mould from car seats yourself if the patch is small, the car is otherwise dry, and you clean gently with the doors open. Vacuum loose growth with a HEPA vacuum, treat the area with an interior-safe mould cleaner, blot rather than scrub, then dry the seat completely. If the mould covers several seats, has stained deep into the foam, or keeps coming back, stop and get professional help, because home methods only reach the surface and a damp cabin will regrow it quickly.

Is your seat mould a DIY job?

Be honest about the scale before you start. A home clean is reasonable when:

• the growth is a few small spots or a light bloom on one or two seats;
• the carpets and headliner look clean;
• you know why it happened, such as a wet coat left on the seat, and that cause has gone.

It is not a DIY job when mould is on most seats, the carpets are wet underfoot, the roof lining is marked, or the smell hits you as soon as the door opens. Those signs point to a moisture problem in the car, and cleaning one seat will not keep up with it. Our guide to working out why a car smells musty helps you trace the cause.

What should you wear and where should you work?

Disturbing mould releases spores into the air, so protect yourself first:

• Disposable gloves and a well-fitting dust mask (an FFP2 or better is sensible).
• Old clothes you can wash straight afterwards.
• Work outdoors on a dry day, with every door open, never in a closed garage.

UK government guidance on damp and mould explains that it mainly affects the airways and lungs, and lists people with asthma, allergies, COPD or weakened immunity, as well as children, older people and pregnant women, among those at higher risk. Mould can aggravate allergies and asthma; see a GP for symptoms. If you are in one of those groups, ask someone else to do the job or book it out.

How do you clean light mould off fabric seats, step by step?

1. Vacuum first. Use a vacuum with a HEPA filter and a brush head on the dry seat, working slowly to lift loose growth. Empty the vacuum outdoors.
2. Choose an interior product. The AA suggests using a mould product designed for car interiors. Test it on a hidden area such as the back of the seat base to check for colour loss.
3. Apply lightly. Mist the cleaner onto a microfibre cloth or a soft upholstery brush, not straight onto the seat, so the foam underneath does not get soaked.
4. Agitate gently. Work from the outside of the patch inwards with small circles, so you do not spread it.
5. Blot and lift. Press a clean, dry microfibre onto the area to draw out moisture and residue. Swap to a fresh face often.
6. Dry completely. Leave doors open in a breeze, or run the heater with the air-con on and windows cracked, until the fabric feels dry right through.
7. Bag and wash the cloths at a high temperature, and vacuum once more when dry.

What about leather and vinyl seats?

Smooth seats are easier because mould tends to sit on the surface. Wipe with a cleaner made for automotive leather, using a soft brush in the stitching and perforations, then dry the seat with a clean towel and apply a leather conditioner once it is fully dry.

Watch the perforations on heated or ventilated seats. Liquid forced into the holes can reach the pad beneath, so use the least moisture you can and never spray directly onto them.

Which products and methods should you avoid?

• Bleach. It can strip colour from fabric and dry out leather, and it does not suit porous materials.
• Soaking the seat. Wet foam takes days to dry and becomes the perfect place for fresh growth.
• Stiff brushes and hard scrubbing. These fluff up the fabric and can push spores deeper.
• Mixing chemicals. Never combine cleaners, especially anything containing bleach with ammonia or acids.
• Air fresheners. They cover the smell and tell you nothing about whether the mould has gone.

When should you stop and call a professional?

Stop if any of these happen:

• stains remain after two gentle attempts, which usually means growth is in the foam;
• marks reappear within a few weeks of cleaning;
• you find more mould than you expected once you start looking;
• the cabin still smells damp after the seat is dry.

On a professional mould treatment visit we treat every affected surface, use high-temperature steam that greatly reduces what remains in the fibres, extract moisture properly and apply a coating that slows regrowth. It starts from £80, and we come to you with our own water and power. If the cause turns out to be water getting in, read how to find and fix a leak into the cabin first, so the clean has a chance to last.

Sources

• GOV.UK: Understanding and addressing the health risks of damp and mould in the home
• AA: Rust, mould and scratch car body maintenance