Skip to content
📦 Ordered before 3 pm, shipped the same day
💚 Free shipping from €19 in NL (otherwise €2.95)

Smelly washing machine? Here’s how to get rid of the smell

Stinkende wasmachine
A smelly washing machine is a common problem, but it can usually be fixed. This blog explains the likely causes and how to get rid of the bad odor.

It's not weird if you're dealing with a smelly washing machine. This is a common problem and luckily, it's easy to fix. But why does your washing machine suddenly smell bad? Let's think about these 3 possible causes:

1. Buildup of dirt and detergent residue: Washing machines often build up residue from detergent and fabric softener, along with dirt from your clothes. These leftovers can hide in tricky corners or behind the door seals, which can cause a musty smell.

2. Low wash temperatures: More and more people are washing at low temperatures. This is great for saving energy, but if you always wash at a low temperature, it gives mold and bacteria a chance to live in your washing machine. That can cause unpleasant odors.

3. Grease louse: If you use too much detergent and fabric softener, a greasy layer can build up in your washing machine. This is called 'vetluis'—but don’t worry, it’s not an actual louse! It’s a bacterial biofilm. This 'vetluis' creates the perfect breeding ground for bacteria and can cause a nasty smell. Read this article to find out what 'vetluis' is and how you can tackle it in your washing machine.

How do you tackle a smelly washing machine?

Follow these steps to make your washing machine smell fresh again:

1. Clean the Soap Tray

Take the soap drawer out of your washing machine.

Soak it in hot water with a bit of dish soap to remove soap residue and mold.

Rinse it well and dry it before putting it back.

2. Clean the Rubber Gasket

Check the rubber gasket (the door seal) for objects and detergent residue.

Dampen a cloth with a mix of water and white vinegar, then thoroughly wipe around the gasket. Pay extra attention to spots where moisture tends to build up.

3. Run a Cleaning Cycle

Fill the detergent drawer with two cups of white vinegar or use a washing machine cleaner.

Set your machine to the hottest cycle with an extra rinse to thoroughly remove all residues.

4. Clean the Filter

Check and clean the filter at the bottom of the washing machine (see the manual for the exact location).

Unscrew the filter, remove any dirt, and rinse it under running water.

5. Leave the Washing Machine Open

After every wash, leave the washing machine door open. This helps the inside dry out and prevents mold and bacteria from growing.

Here's how to make sure your washing machine never smells bad again

To keep your washing machine from turning into a breeding ground for unpleasant odors, regular maintenance is key. Here are some handy tips to keep your washing machine clean and fresh:

1. Clean the rubber edgesThe rubber seal around your washing machine door can easily trap dirt and moisture. Wipe it down with a dry cloth after every wash, and once a month use a damp cloth with a mild cleaner to prevent residue buildup.

2. Maintain the soap traySoap trays can collect soap residue and mold, which adds to the bad smell. Take the soap tray out of the machine regularly and clean it thoroughly under running warm water. You can use an old toothbrush to remove stubborn dirt.

3. Run a hot wash every now and thenBacteria and grease build-up thrive in both cold and warm conditions, but a hot wash (90°C) can effectively kill them. It's a good idea to run an empty wash at the highest temperature with a washing machine cleaner or regular white vinegar at least once a month.

4. Check and clean the filterThe filter catches objects and dirt that could otherwise damage your machine. Check the filter every month and clean it according to the manufacturer's instructions to keep your washing machine running efficiently.

5. Check the drain hoseMake sure the drain hose of your washing machine isn’t clogged or kinked. If the water flow is blocked, it can cause water to stagnate in the machine, which can lead to unpleasant odors.

If you regularly maintain your washing machine, there's a very small chance it'll start to smell! Start by cleaning the rubber seals, the detergent drawer, and the filter. And if you also run a hot wash every now and then, you'll keep your washing machine clean and fresh. 

Back to blog

Leave a comment

Please note, comments need to be approved before they are published.

Our mission is to reduce plastic waste in our everyday products and make this possible for everyone in our society.

Logo Cosmeau Square White
  • Leaf icon Prices that are accessible for everyone
  • Leaf icon Donations to the food bank and commitment to impact for the underprivileged
  • Leaf icon Innovations and improvements in logistics, products and local production
  • Leaf icon Profit for impact. Your contribution helps planet, animals and people

We strive for

Plastic vrij
Plastic-free

As much as possible without plastic and biodegradable

Dierproef vrij
Cruelty-free

We never test on animals

Plantaardig
Plant-based

Plant-based formulas with the power of nature

Vaste vorm
Concentrated

No unnecessary transport of water

✨ Holiday and Sun Offers — May 2026
✨ Holiday and Sun Offers — May 2026

Zomerbries, 2+2 wasstrips, zomer aanbiedingen en een productie-update over de volgende generatie wasmiddel.

✨ Spring clearance discount - New: Felt storage boxes - April 2026
✨ Spring clearance discount - New: Felt storage boxes - April 2026

This post was originally sent as a Cosmeau newsletter in April 2026. Summary Mailing ✨ New:Neat felt storage boxes 🌱🌞...

🌱🌞 Spring cleaning: 1+1 Spring Fresh Wax Strips — March 2026
🌱🌞 Spring cleaning: 1+1 Spring Fresh Wax Strips — March 2026

Ready for the big cleaning? Discover our 1+1 Spring Fresh washing strips, Spring Fresh offers and useful cleaning tips.

Sorting laundry without hassle: this way you prevent discoloration and gray laundry
Sorting laundry without hassle: this way you prevent discoloration and gray laundry

Sorting laundry doesn't have to be complicated. With a simple division by color, fabric and temperature you prevent discoloration, gray wax and unnecessary wear.

Clean dishwasher without aggressive agents
Clean dishwasher without aggressive agents

Cleaning your dishwasher without aggressive agents is fine, as long as you tackle the filter, grease and hidden dirt in the right way.

Smelly Dishwasher? This Is Usually the Real Cause and How to Fix It
Smelly Dishwasher? This Is Usually the Real Cause and How to Fix It

A smelly dishwasher is usually caused by grease buildup, food residue, or a dirty filter. This article explains the real causes and the fixes that actually work.

August Update on Scent Booster Production
August Update on Scent Booster Production

Cosmeau shares a new update on scent booster production in the Netherlands. The machines shipped in June have now been unloaded and moved into place safely.

June Update on the Scent Booster Production Machine
June Update on the Scent Booster Production Machine

In June, Ben and Jason traveled to China to inspect the scent booster machines in person. This update gives you a look at the production equipment and the trip behind it.

How Is a Laundry Detergent Sheet Made? Part 1
How Is a Laundry Detergent Sheet Made? Part 1

Cosmeau shares its journey toward local production in the Netherlands and shows how the first laundry sheet tests began. Part 1 covers how the production project started in 2022.

200,000+ already help clean more sustainably

Gebruikers van Cosmeau

Reviews

Reviews on google.com 4.8/5
295
Reviews on bol.com 9.3/10
587

Questions?

Our support heroes are ready for you!

Support Support
  • Leaf icon Chat, email or call. We are ready for all your questions and suggestions.
  • Leaf icon 088 04 04 488 Call on weekdays between 10-17h.
  • Leaf icon 100% satisfaction guarantee We want to keep the barrier as low as possible for you.

Consider taking a subscription

  • Leaf icon Always the best price with automatic discounts up to 50%
  • Leaf icon No obligations you are not tied to anything
  • Leaf icon Free gifts samples, testers, and trial packs
  • Leaf icon Always enough stock of your cleaning products
  • Leaf icon Reminder before we send your next shipment, adjust, pause, or cancel

Follow us on @cosmeau.eco?