How to Clean a Washing Machine: Front & Top Loaders

A washing machine cleans everything else in your home, so it is easy to assume it stays clean itself. It does not. Every load leaves behind a thin film of detergent, fabric softener, body oils, lint and hard-water minerals. Add the warm, damp, dark environment inside a sealed drum and you have close to perfect conditions for mildew and odor-causing bacteria. The good news is that cleaning a washing machine is straightforward, cheap, and takes only a few minutes of hands-on effort once a month. This guide walks through both front-load and top-load machines, the parts most people forget, and the safest way to choose between vinegar, bleach and commercial cleaners.

Why does a washing machine need cleaning?

The main culprit is buildup. Modern high-efficiency (HE) machines use very little water, which means detergent and softener do not always rinse away completely. Those residues collect on the drum, in the dispenser drawer, and along seals and hoses. Over time they turn into a sticky biofilm that traps moisture and feeds mold. This is why an overdue washer often smells musty or sour, and why clothes can come out less fresh than they went in.

Front-load machines are especially prone to this because their door forms an airtight seal against a flexible rubber gasket. That seal is excellent at keeping water in during a wash, but it also traps water, lint and grime in its folds afterward. The tight seal creates exactly the warm, moist pocket where mold thrives, which is why the gasket is the number one trouble spot on front-loaders.

There is also a performance and longevity angle. A clogged detergent drawer dispenses poorly. A blocked drain filter makes the pump work harder and drain slowly. Mineral scale from hard water reduces heating efficiency. Regular cleaning keeps the machine running well and helps it last longer, on top of keeping your laundry smelling clean.

One overlooked cause deserves special mention: using too much detergent. There is a real gap between the dose many people pour in and the amount an HE machine actually needs. Excess soap does not get rinsed out; it lingers and turns into the mildew-feeding residue you are trying to remove. Measuring carefully, and using the correct HE-rated formula, prevents a surprising share of washer odor problems before they begin.

How do you clean a front-load washer?

Front-loaders need attention in three places: the drum, the rubber door gasket, and the parts that hide grime, namely the detergent drawer and the drain pump filter. Tackle them in that order.

Run a cleaning cycle for the drum

Many front-loaders have a dedicated Self Clean or Tub Clean cycle. If yours does, use it. Add your cleaning agent to the main detergent compartment (not the bleach cup), then start the cycle right away. A self-clean cycle on a front-loader typically runs around four hours because it uses extra hot water and long agitation to break down buildup.

1. Empty the drum completely; never wash clothes during a clean cycle.
2. Add your chosen cleaner: a washer-cleaning tablet, about a cup of liquid chlorine bleach, or two cups of white vinegar (use only one of these, never combined).
3. Select the Self Clean, Tub Clean, or hottest and longest available cycle.
4. When it finishes, wipe any loosened residue from the drum with paper towels and run a short Rinse and Spin to flush everything out.

Clean the door gasket

Peel back the rubber gasket gently and look inside the folds. You will often find trapped hair, lint, coins and a dark film of mildew. Spray the gasket with a mildew cleaner or a diluted bleach solution, or make a paste of baking soda and a little water, then scrub with a cloth, a sponge, or an old toothbrush. Reach into every crevice with cotton swabs, and be sure to clean underneath the seal where grime hides out of sight. If you use a vinegar-and-water mix instead, do not follow it with bleach. Wipe the gasket dry when you finish.

Clean the detergent drawer and drain filter

Pull the detergent drawer all the way out (most release with a small tab or lever) and wash it in warm, soapy water, using a toothbrush on the fabric softener and bleach channels where sludge collects. Wipe out the empty cavity too, then let the drawer air-dry before sliding it back.

The drain pump filter, sometimes called the coin trap, is the part most people never touch. On front-loaders it lives behind a small access panel at the bottom front corner. Because water will spill out, prep first:

1. Unplug the machine and lay a towel down with a shallow pan in front of the panel.
2. Open the access door, detach the small drain hose if there is one, uncap it, and let the water empty into the pan.
3. Turn the round filter counterclockwise, pull it out, and clear away lint, coins, buttons and hair.
4. Rinse the filter under warm water, using a soft brush on stubborn lint, then reinsert it and turn clockwise until snug.

Aim to check this filter every one to three months. A clogged filter is a common reason a washer drains slowly or develops a smell that survives a clean cycle.

How do you clean a top-load washer?

Top-loaders are generally more forgiving because the lid does not seal as tightly, so they trap less moisture. They still need a regular clean, and the method is a little different depending on whether you use vinegar or bleach.

The vinegar and baking soda method

This is the go-to for routine maintenance and light odor.

1. Set the machine to the hottest water and the largest, longest load setting with the drum empty.
2. Add two cups of white vinegar to the drum (or to the detergent dispenser) and let it run.
3. For a deeper clean, pause the cycle once it is full and let it soak for 30 to 60 minutes, then let it finish.
4. Run a second hot cycle with half a cup of baking soda sprinkled into the drum to neutralize odors and rinse away loosened residue.

While the machine fills, dip a cloth or sponge in the vinegar water and wipe down the top rim, the underside of the lid, and around the opening where grime collects.

The bleach method for stubborn smells

If you are fighting a strong sulfur, sewage or bacterial odor, bleach disinfects more thoroughly than vinegar. Do this as a separate cleaning, never in the same cycle as vinegar.

1. If your top-loader has a detergent dispenser, add two cups of chlorine bleach there and two cups directly into the drum. With no dispenser, add about four cups to the drum.
2. Start the longest, hottest cycle so the machine mixes the bleach with the water.
3. Pause for about 30 minutes to let it soak, then restart and let the full cycle finish.
4. Run one more hot rinse cycle with nothing added, to make sure no bleach remains before your next load.

On agitator-style top-loaders, wipe down the central agitator and, if the cap lifts off, clean underneath it, where fabric softener sludge tends to hide. Older top-loaders can also collect grime under the removable fabric softener dispenser ring.

Which cleaner should you use, and what is safe?

You have three main options, each with strengths and trade-offs. The single most important safety rule cuts across all of them: never mix chlorine bleach with vinegar, ammonia, or any acidic or oxygen-based cleaner. Combining bleach and vinegar releases toxic chlorine gas. Choose one product per cleaning cycle, and rinse thoroughly before switching methods.

For most people, a simple rotation works well: use a dedicated washer cleaner or vinegar for routine monthly maintenance, and reserve bleach for the occasional deep clean when mold or a strong odor appears. Commercial tablets are convenient because they release slowly over the cycle and leave little smell, and they contain surfactants that plain vinegar lacks for breaking down soap scum.

How do you keep it fresh and prevent smells?

Cleaning is only half the job; prevention keeps you from having to deep-clean as often. A few small habits make the biggest difference.

The most effective single tip is to leave the door and detergent drawer slightly open between washes. This lets air circulate so the drum, gasket and dispenser dry out instead of staying damp and breeding mildew. On a front-loader, also wipe the rubber gasket dry after each load, or at least after heavy or hot washes, to clear the water that pools in its lower fold.

Move laundry to the dryer promptly. Wet clothes left sitting in the drum reintroduce moisture and that familiar musty smell within hours. Measure detergent carefully and use the correct HE formula in HE machines, since overdosing is a leading cause of the residue that feeds odor. If you have hard water, a periodic vinegar or descaling cycle helps keep mineral scale from building on the heating element and drum.

Finally, build the deep clean into a routine. The schedule below covers the tasks and how often to do them.

Stick to this rhythm and your washer will stay fresh, run efficiently, and last longer, and your laundry will actually smell as clean as it looks. Cleaning the machine that cleans your clothes is one of the highest-return chores in the house: a few minutes a month spares you musty towels, slow drains, and the far bigger job of scrubbing out mold that has been allowed to settle in.