Why does my washing machine smell?

Ken Newman
We had a new washing machine delivered and installed plus old machine taken away by a very good engineer we were the first for this as they only started delivering new washing machines last Friday.
Graham Rolland
Shauna was brilliant. Had some poor service from other companies and thank fully got put through to Shauna. Super helpful and got my service booked in at the earliest/best available slot.

Washing Machine Repairs in Alton, East Hampshire

You've spent time and money washing your clothes, yet they smell worse than when they went in. This situation turns what should be a simple household chore into a genuine annoyance.

Nothing is more frustrating than pulling a load of “clean” laundry from your washing machine, only to be hit with an unpleasant odour.

The good news is that a smelly washing machine isn’t a lost cause. Understanding the root causes behind these unpleasant odours is the first step toward reclaiming fresh-smelling laundry and restoring your washing machine to proper working condition. Let’s explore the most common culprits behind washing machine odours and what you can do about them.

Mold and Mildew Growth 

The most frequent cause of washing machine odours is mold and mildew growth. Your washing machine creates the perfect storm for fungal development: a dark, warm, moist environment where spores can thrive undisturbed. After each wash cycle, residual moisture lingers in the drum, door seals, and internal components, providing the ideal breeding ground for these unwelcome microorganisms.

Front-loading washing machines are particularly susceptible to this problem due to their horizontal drum design and rubber door gaskets, which create numerous crevices where water can pool. The airtight seal that makes these machines energy-efficient also traps moisture inside, preventing proper air circulation. Top-loading machines, while less prone to this issue, aren’t immune—especially models with impeller designs that can trap water in hard-to-reach areas. 

Soap Scum and Detergent Buildup

Over time, soap residue and detergent deposits accumulate throughout your washing machine’s internal systems. This buildup occurs gradually, layer by layer, creating a sticky film that attracts dirt, bacteria, and odour-causing compounds. Using low-quality detergents or adding too much product accelerates this process, as excess soap doesn’t fully dissolve and rinse away during the wash cycle.

Hard water compounds the problem significantly. Mineral deposits from calcium and magnesium interact with soap ingredients, forming stubborn scum that adheres to drum walls, hoses, and other internal components. This mineral-soap combination creates an ideal environment for bacterial growth while producing its own distinctive musty odour.

Dirty Door Seals and Gaskets

The rubber seals and gaskets around your washing machine door harbour surprising amounts of debris. Hair, lint, small fabric pieces, and even forgotten items like coins or tissues become trapped in these flexible barriers. These hidden pockets collect standing water and organic matter, creating localized breeding grounds for bacteria and mold.

Many homeowners overlook these areas during regular cleaning routines, allowing buildup to accumulate for months or even years. The folded design of rubber gaskets creates natural collection points that are difficult to see and clean without deliberate effort, making them persistent sources of unpleasant odours.

Clogged Drain and Filter Issues

Your washing machine’s drainage system plays a crucial role in odour prevention. When drains become partially blocked or filters clog with lint and debris, water begins to stagnate within the system. This standing water quickly develops bacterial growth, producing sulphur-like or sewage odours that permeate your entire laundry area.

Poor ventilation exacerbates drainage problems by preventing proper air circulation throughout the machine’s internal systems. Without adequate airflow, moisture lingers longer, and odour-causing compounds become concentrated rather than dissipating naturally.

Water Temperature Mistakes

Many people default to cold water washing to save energy and protect delicate fabrics, but this choice can contribute to odour problems. Cold water doesn’t dissolve detergents as effectively as warm water, leading to residue buildup over time. Additionally, many bacteria and mold spores survive cold wash cycles, continuing to multiply within your machine.

Fabric softeners and conditioning agents perform poorly in cold water, often leaving behind waxy deposits that accumulate on drum surfaces and internal components. These deposits trap odours and provide nutrients for bacterial growth, creating a self-perpetuating cycle of unpleasant smells.

Call a Professional Appliance Technician

For appliance repairs in Alton and across East Hampshire, our team at Service 87 will work hard to get your vacuum back in top working order safely and efficiently. Over the years we’ve helped lots of people get their appliances working again! Our expert team in Alton is here to help you too, if you live in the GU or RG postcode near the Hampshire-Surrey border. We fix a wide range of household appliances including laundry appliances, cooking appliances including gas hobs, cookers & ovens, refrigeration repairs including fridges, freezers, coolers & combinations, and dishwashers

We cover Alton, East Hampshire, the Hampshire/Surrey border and the A31 corridor including Aldershot, Basingstoke, BordonBracknellFarnborough, Farnham, Fleet, Godalming, Guildford, Liss, Petersfield, ReadingSloughWindsor and Woking. Call in our professional team of appliance repair engineers from Service 87. Book a repair online, email us at jobs@service87.co.uk, or call 01420 481120.

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