How to Get Rid of Musty Smells from Upholstery: A Deep-Clean Guide

You know that moment when you flop down on the sofa after a long day, expecting a warm hug from your favourite cushioned corner, only to be met with a faint whiff of “old attic”? Yeah, that. Musty smells in upholstery have a way of sneaking up on you. They’re subtle at first, like a distant relative overstaying their welcome, then suddenly it’s all you can smell.

The good news: you don’t have to live with it. Whether it’s your sofa, armchair, or that vintage chaise you rescued from the charity shop, there’s a way to Get Rid of Musty Smells from Upholstery, clean scent without dousing it in half a bottle of fabric spray. Let’s break it down properly.

1. Why Your Upholstery Smells Musty in the First Place

Musty smells don’t just appear out of nowhere—they’re usually a polite (well, impolite) nudge from trapped moisture, dirt, or bacteria. Here are the usual suspects:

1. Moisture build-up: Even the tiniest bit of dampness can become a breeding ground for mould and mildew, especially in humid homes or during rainy British winters. Think wet clothes left on the sofa, or windows left open during a drizzle.

2. Everyday use: Over time, sweat, oils, crumbs, pet fur, and general life settle into the fabric. It’s like a soft, cushioned diary of everything that’s ever happened in that seat.

3. Poor ventilation: Upholstered furniture that’s shoved up against walls or left in rooms with little airflow tends to trap odours.

4. Old furniture syndrome: If your sofa’s been around longer than some members of your friendship group, it’s probably absorbed a fair amount of stale air and moisture over the years.

2. The Prep Work: Don’t Skip It

Before you go full domestic warrior on your furniture, you need to do some prep. This step might not be glamorous, but it’s crucial if you actually want to remove the musty smell from your upholstery properly.

Vacuum thoroughly: Start by vacuuming every inch—cushions, seams, corners, and underneath. Use a brush attachment to lift dust and dirt from the fibres. You’ll be shocked at what comes out.

Remove and wash covers (if possible): If your cushions have removable covers, whip them off and check the care labels. A gentle cycle with a mild detergent usually works wonders. Just make sure they’re completely dry before putting them back on—damp covers will undo all your hard work.

Check for stains or mould spots: This is the time to inspect closely. If you spot any mould, don’t panic—we’ll tackle that shortly. But knowing where the problem areas are helps you target them later.

3. Deodorising: Neutralise, Don’t Mask

This is where most people go wrong—they spray, sprinkle, or light every scented candle in the house, hoping to cover the smell. It doesn’t work. You’ve got to neutralise the odour at its source.

Bicarbonate of soda to the rescue: Sprinkle a generous layer of bicarb over the upholstery and let it sit for at least 15 minutes—longer if you can. Bicarb is brilliant at absorbing smells. For deeper odours, leave it overnight. Then vacuum it up thoroughly.

Vinegar mist (don’t drench): Mix equal parts white vinegar and water in a spray bottle. Lightly mist the fabric—don’t soak it. Vinegar naturally neutralises odours, and the smell disappears as it dries. Test on a small hidden patch first, just to be safe.

Sunlight and airflow: If possible, move your sofa or chair near a sunny, well-ventilated window. Fresh air and UV light are natural deodorisers and help dry out lingering moisture.

4. Deep Cleaning: Getting Serious with the Stink

If the musty smell is clinging on like a toddler refusing to leave the playground, it’s time for a proper deep clean. This step is especially useful for removing mouldy smells from upholstery.

Steam cleaning: A steam cleaner can work wonders. The heat kills bacteria and mould spores, and the steam lifts dirt embedded deep in the fabric. Just make sure the fabric is suitable for steam (check the label). Work in sections, and let everything dry completely afterwards.

Fabric cleaner or upholstery shampoo: For a more traditional deep clean, use a gentle upholstery shampoo or make your own: mix warm water, a small amount of mild detergent, and a splash of vinegar. Lightly scrub the fabric with a soft cloth or sponge, then blot with a clean towel. Don’t over-soak—it’s about cleaning, not drenching.

Tackling mould specifically: If you spotted mould earlier, mix one part rubbing alcohol with one part water and dab it onto the affected area with a clean cloth. Don’t scrub, as this can spread the spores. Afterwards, let it dry fully in a well-ventilated space.

5. Prevention: Keeping It Fresh Long-Term

You’ve done the hard work. Now it’s about making sure that musty smell doesn’t come back like an unwanted sequel.

Improve ventilation: Pull furniture slightly away from walls and make sure there’s a decent flow of air through the room. A small dehumidifier can work wonders in damp spaces.

Regular vacuuming: A quick once-over every week stops dust and odours from building up. Think of it as a mini refresh rather than a chore.

Spot clean spills immediately: Don’t let liquids linger. The sooner you deal with them, the less likely they are to cause damp smells later.

Rotate cushions and covers: This helps everything wear more evenly and reduces the chance of hidden moisture pockets forming.

6. FAQs About Musty Upholstery Smells

How often should I deep clean upholstery?
Every 6–12 months is ideal for a full deep clean, depending on how much use it gets. High-traffic sofas might need it more often.

Can I use essential oils to make it smell nicer?
Yes, but sparingly. A few drops in your vinegar spray can add a pleasant scent, but don’t rely on oils alone—they mask rather than remove odours.

What if the smell still won’t go away?
If you’ve tried everything and the smell persists, the culprit might be the padding inside. In some cases, replacing the foam or calling in professional upholstery cleaners is the only solution.

Fresh Sofa, Fresh Start

Getting rid of that musty odour isn’t just about making your living room smell nice. It’s about reclaiming your space. With the right mix of deodorising, deep cleaning, and prevention, your furniture can go from “damp cellar” to “Sunday morning fresh” again. So roll up your sleeves, grab the bicarb, and give that sofa the spa day it deserves.