When did you last clean the machine that cleans your clothes? If the answer is “never,” that is common. Most people scrub their shirts, sheets, and towels every week but never think about the appliance doing the scrubbing. Yet a washing machine is a warm, wet, dark box, which is exactly the environment mould and bacteria love. The result is that faint musty smell on supposedly fresh laundry, grey streaks on white shirts, and a drum that works harder than it should.
The good news is that cleaning a washing machine is not complicated. It takes a couple of hours a few times a year, a few common household items, and a handful of habits that cost nothing. This guide walks through what actually works, what to skip, and how to tell whether your machine is due for a deep clean.
Why a Washing Machine Gets Dirty in the First Place
Every load leaves something behind. Detergent residue, fabric softener, lint, body oils, dead skin, and soil all flow through the drum, the hoses, and the detergent drawer. Most of it drains away, but a thin film stays on the surfaces. Add moisture and warmth, and that film becomes a food source for mould and bacteria.
Two design details make this worse. First, front-loading machines seal tightly, so the drum stays humid for hours after a wash. Second, the door gasket, the rubber ring around the opening, has folds that trap water, lint, and grime. That gasket is the single highest-risk spot for mould in a front-loader. Top-loaders have their own weak points: the fabric-softener dispenser and the space under the lid.
Hard water adds another layer of trouble. Minerals build up as limescale on the heating element and inside the drum, which makes the machine work harder to heat water and can shorten its life. If you notice white crusty deposits or your towels feel stiff, scale is likely part of the story.
What You Need Before You Start
You do not need a cupboard full of specialist products. A basic kit covers most situations:
| Item | What it does | Notes |
|---|---|---|
| White vinegar | Loosens mineral scale and light residue | Check your manual first; some makers warn against frequent use |
| Baking soda | Gentle abrasive and odour absorber | Good for scrubbing the drawer and seal |
| Dedicated washing machine cleaner | Formulated descaling and cleaning | Follow the pack dose |
| Citric acid | Descaler for hard-water areas | Dissolve in warm water |
| Old toothbrush or soft brush | Reaches gasket folds and drawer corners | Do not use anything abrasive on rubber |
| Microfibre cloths | Wiping and drying | Keep one just for the machine |
| Rubber gloves | Protects hands from cleaners | Especially with bleach solutions |
One caution before you begin: vinegar is popular but not universally endorsed. Some manufacturers warn that repeated vinegar use can degrade rubber seals and hoses over time, while others accept it. Check your own machine’s manual before making vinegar your go-to. A dedicated cleaner or citric acid is the safer default if you are unsure.
Step-by-Step: Cleaning a Front-Loading Machine
Front-loaders need the most attention because they trap moisture. Set aside about an hour and work through these steps in order.
- Run an empty hot cycle first. Choose the hottest setting, add a dedicated cleaner or a cup of white vinegar to the drum (not the drawer), and let the machine run. This loosens grime throughout the system before you scrub the accessible parts.
- Clean the door gasket. Pull back the rubber seal and look inside the folds. Wipe away lint, hair, and dark spots with a cloth dipped in diluted vinegar or a mild bleach solution. Dry the gasket thoroughly afterwards. This step alone fixes most musty smells.
- Remove and wash the detergent drawer. Pull it out according to your manual, rinse it in warm soapy water, and scrub the corners with a toothbrush. Look at the housing behind the drawer too, because mould often hides there.
- Clean the drain pump filter. On most front-loaders this is a small hatch at the bottom front. Place a towel and shallow tray underneath, because water will come out. Remove coins, lint, and debris, rinse the filter, and screw it back firmly.
- Wipe the drum and door glass. A damp cloth is enough for the visible surfaces. Dry everything.
- Leave the door and drawer open so the interior can air out completely.
If your machine has a Tub Clean or Drum Clean programme, use it instead of a manual hot cycle. It is designed for exactly this job and often runs at a higher temperature than a normal wash.
Step-by-Step: Cleaning a Top-Loading Machine
Top-loaders are more forgiving, but they are not self-cleaning. The routine is shorter.
- Fill the drum with the hottest water and add a dedicated cleaner, citric acid, or vinegar. Let the machine agitate for a few minutes, then pause the cycle and leave it to soak for about an hour.
- Clean the fabric-softener dispenser. This is the top-loader’s biggest mould hotspot. Softener residue is thick and sticky, so scrub it with warm soapy water and a brush.
- Wipe under the lid and around the rim. Grime collects where splashes dry.
- Let the cycle finish, then wipe the drum dry.
- Leave the lid open between washes so moisture can escape.
The Habits That Keep It Clean
Deep cleaning is only half the job. The other half is what you do every week. These small habits make the biggest difference:
- Leave the door or lid ajar after every wash. Trapped moisture is the root cause of most odour problems.
- Dry the door gasket with a cloth once a week on front-loaders.
- Use the right amount of detergent. More suds do not mean cleaner clothes; excess detergent leaves residue that feeds mould.
- Ease up on fabric softener, or skip it. It coats fibres and the machine alike.
- Run a hot wash occasionally. Constant cold washing saves energy but lets residue accumulate. A hot cycle every few weeks helps.
- Wipe the detergent drawer whenever you notice build-up.
If you want to know how much energy each cycle actually uses, a smart plug washing machine power monitoring works practice guide can help you see the difference between a cold quick wash and a hot maintenance cycle, so you can plan hot washes without worrying about the bill.
How Often Should You Clean It?
Here is where advice gets messy. Recommended frequency varies widely across sources: some suggest monthly, others every three months, and some say annually is fine. There is no single standard, so use your own signals instead of a fixed calendar.
| Signal | What it suggests |
|---|---|
| Musty smell after a wash | Clean now, then check the gasket and filter |
| Grey streaks or spots on laundry | Residue build-up in the drum or drawer |
| Visible dark spots on the gasket | Mould; clean and dry thoroughly |
| White crust on the heating element or drum | Limescale; descale |
| Slow draining | Clogged pump filter |
| No symptoms at all | A deep clean every three to six months is reasonable |
Households that wash mostly at low temperatures, use a lot of softener, or live in hard-water areas should lean toward the more frequent end. A busy family with daily loads will also need to clean more often than someone running two washes a week.
Common Mistakes People Make
A few well-meaning habits actually make things worse.
- Pouring vinegar into the detergent drawer. It can damage the drawer’s finish and does not reach the drum properly. Add it to the drum instead.
- Mixing vinegar and bleach. This creates a harmful gas. Never combine them in the same cycle.
- Skipping the filter. People clean the drum and forget the pump filter, which is often where the smell starts.
- Closing the door straight after a wash. This seals in moisture and invites mould.
- Overfilling the machine. Overloaded drums do not rinse properly, leaving residue behind.
- Using too much cleaner. Follow the dose on the pack; more is not better.
If your machine sits in a damp basement or utility room, moisture control matters as much as cleaning. Understanding mould prevention and moisture control in the home helps explain why ventilation around the appliance makes such a difference to how quickly odours return.
When to Call a Professional
Most cleaning is a DIY job, but some problems need a technician. Call for help if the machine leaks from underneath, if the drum does not spin, if the drain pump filter housing is cracked, or if a persistent smell returns within days of a thorough clean. A smell that survives a hot cycle, a gasket scrub, and a filter clean usually points to a blocked drain hose or a build-up deeper in the system than you can reach.
If you are shopping for a replacement because the old machine has reached the end, it is worth knowing that maintenance affects running costs. The official Energy Star clothes washers information explains how efficiency ratings are calculated and why a well-maintained machine performs closer to its rated figures. And if you are weighing a combined unit, a guide to the washing machine with dryer best brand options can help you compare before you buy. (Washing machine)
Protecting the Area Around the Machine
A clean machine still needs a dry floor. Small leaks around the door seal or the water inlet are easy to miss until they damage flooring or the ceiling below. Placing a water leak sensor under the washing machine where place it makes sense, because early warning turns a potential flood into a minor mop-up. Wipe up spills promptly, and check the hoses behind the machine once a year for cracks or bulges.
Conclusion
Cleaning a washing machine comes down to three things: remove the residue, dry the moisture, and repeat on a sensible schedule. The gasket, the detergent drawer, and the pump filter do most of the damage when ignored, and a hot cycle with a suitable cleaner handles the parts you cannot reach. None of it is difficult, and most of it takes less time than folding a load of laundry. Start with one deep clean this weekend, then build the small habits into your routine. Your clothes will smell fresher, your machine will last longer, and you will stop wondering why “clean” laundry never quite smells clean.
Frequently Asked Questions
Can I clean my washing machine with just vinegar and baking soda?
Yes, for light cleaning. Vinegar loosens mineral residue and baking soda helps with odours and gentle scrubbing. But check your manual first, because some manufacturers warn that repeated vinegar use can degrade rubber seals and hoses. For hard water or a persistent smell, a dedicated cleaner or citric acid is the more reliable choice.
How often should I clean my washing machine?
There is no single agreed standard. Many sources suggest monthly, others every three months, and some say annually is enough. A practical approach is a deep clean every three to six months, plus a gasket wipe weekly and a filter check whenever draining slows or you notice a smell.
Why does my washing machine smell even after cleaning?
The usual culprits are a gasket with mould deep in its folds, a clogged drain pump filter, or residue in the detergent drawer housing. If you have cleaned all three and the smell returns within days, the drain hose may be blocked or there may be build-up deeper in the system. That is a job for a technician.
Is it safe to use bleach in a washing machine?
Diluted bleach can be used on the door gasket to kill mould, and some machines allow a bleach cycle, but check your manual first. Never mix bleach with vinegar or other acidic cleaners, because the combination releases a harmful gas. Wear gloves and ventilate the room.
Do top-loading machines need cleaning too?
Absolutely. Top-loaders avoid the tight-seal moisture problem of front-loaders, but the fabric-softener dispenser and the area under the lid collect sticky residue that grows mould. A hot soak cycle plus a dispenser scrub every few months keeps them fresh. (Mold Course Chapter 2: How Mold Grows)
Can a dirty washing machine damage my clothes?
It can. Residue, mould spores, and limescale particles can leave grey streaks, dark spots, and a musty smell on laundry. Over time, scale also makes the machine work harder to heat water, which raises running costs. Regular cleaning protects both the clothes and the appliance.
