Get rid of washing machine smells

 This article looks at the importance of a maintenance wash using the hottest program, and how to get rid of mouldy, musty or bad smells from washing machines. It also points to the causes so as to protect from the problem in the first place or prevent re-occurrence. A washing machine covered with gunge and grease inside can also cause marks on laundry especially if laundry gets dragged round the rim of the drum and picks up grease from under the door seal.

There are various products available online and in supermarkets claiming to freshen up washing machines and get rid of bad odours. My personal experience with these products (which are also aimed at dishwashers) is that they do a good job of freshening up a relatively clean washer or dishwasher but are not so good at curing a genuinely smelly one. If your appliance is seriously smelly, especially if coated in black mould or greasy gunge, then it can be very difficult or even impossible to cure but there are some things worth trying..

Carry out one or more maintenance washes

Hot wash

90° or 95°

Not many people use hot washes any more, and this is partly to blame for the bad smells because hot water helps to kill bacteria and cut down grease. One of the first things to try is to put the washing machine on a boil wash cycle (90° or 95°) with detergent inside – but no laundry. You may need to try this more than once.

 Also, you could try to clean the washing machine inside using soda crystals which dissolve grease. I recommend putting half a packet inside the drum and washing on a boil wash (or follow instructions on the packet). Using this method every month or so, or using ordinary detergent if no soda crystals are available can help prevent smells from your washing machine. If your washing machine is badly affected by grease and slime, it may be very difficult to remove it.

This is particularly important if you mostly use low temperature washes and (or) liquid detergent, and other washing machine detergent which doesn’t contain bleaching agents such as colour friendly detergent. If you do, then buy some detergent that does, and use it for your maintenance washes. This will help kill off bacteria and prevent black mould and grease. Tip: Look for something like, "bleaching agents" in the ingredients.

Don’t put chemical cleaning bleach in the washing machine, there are certain types of bleach (eg. oxygen bleach) that are appropriate for laundry.

Get rid of washing machine odours using vinegar

White Vinegar White distilled vinegar has an array of uses. Try putting half a cup of white (distilled) vinegar inside an empty machine and put it on a boil wash. Note that because the first bit of water goes into the sump hose and is sealed off, I recommend that you wait until the washing machine has been filling for about 15 seconds before pouring the vinegar into the soap drawer where water is running in to let it wash down into the machine. I've had reports back from people that this does actually work.

(This is a completely revised and updated article first published in 2002 on my other site Washerhelp )

What causes washing machine smells?

Causes of grease, slime and black mould inside washing machines

Smells Washing machines now commonly suffer from a build up of a greasy deposit and bacteria which causes bad smells, rots hoses & door seals and blocks the pressure system causing overfilling or spin failure. An even more serious consequence of this problem is that the aluminium based drum spiders can be corroded by the build up of grease and gunge, which can cause one or more of the drum’s arms to break. This is often fatal to the washing machine.

Rotted drum spiderThis problem was virtually unheard of before the 1980s but when detergents started to become more environmentally "friendly" and liquid detergents were invented this issue suddenly appeared. It seems that the problem is worse when a combination of factors are involved, but almost everyone suffering the worst cases of this slimy grease uses 40 degrees washes almost exclusively. This, combined with either poor quality detergents, not using the recommended quantities, or only using colour-friendly detergents or liquid detergent which contain no bleach allowing bacteria to thrive can seriously rot a washing machine inside.

Here’s an example of the level of gunge that can build up inside a washing machine.

gunged Large deposits of grease, slime and undissolved detergent have built up on the underside of this door seal, which can cause smells. If you were to wash greasy plates in a plastic washing up bowl with the water at 40 degrees you would expect the plates to come clean but when emptying the bowl there is likely to be a greasy film coating it. To break down grease you need higher temperatures. Washing the same plates at 60 degrees or higher I would expect the grease to be dissolved more effectively.

To check if your washing machine is being badly affected, carefully examine the inside of the door seal for slime and grease. Pull the lip back in front of the drum and look underneath and on the lip of the tub. If the door seal is covered in black mould it will probably need replacing.

Smells from the plumbing

Washing machine smells can also be caused by plumbing issues. Check out this article for more details – Smells caused by plumbing faults.

Black Mould?

Low temperature washes are part of the smelly washing machine problem Washing at 30 degrees?

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  1. avatarWMUser says

    Apparently “Affresh” is said to be the best washing machine cleaner on the market. What do you think? Affresh also make tablets for cleaning the internals of the dishwasher.

  2. avatar says

    Afresh is one of the products I meant when I said I’d found they were good at freshening up a relatively clean washer or dishwasher but not so good at curing a genuinely smelly one. Have you found it any good for particularly dirty smelly appliances?

  3. avatarWMUser says

    I use affresh and it does keep the washing machine clean. I have recently used their dishwasher cleaner and you can see the difference inside the dishwasher after using the stuff. :)

    I don’t know how well affresh cleans washing machines and dishwashers which are already smelly because they have not been cleaned monthly, but the instructions do say that more than one use is required in particularly dirty appliances. From what I’ve read about affresh, it’s meant to be better than bleach and it sends all of the dirty gunk down the drain. Anyway, I’m sure people call out an engineer when their washing machine or dishwasher is always smelling bad.

  4. avatar says

    I’ve also found the cleaning products leave our dishwasher smelling and looking lovely (lemon) but our dishwasher is nice and clean anyway. I don’t think they can help much with a really bad smelly appliance although repeated uses may help. I’d be happy to promote any product that can genuinely cure a really smelly washing machine covered in grease slime and gunge inside.

  5. avatarSteve Parrett says

    Drum Cleaning: Just purchased a Beko washing machine which recommends a ‘ cotton-90’ wash cycle for drum cleaning before proper washing. This cycle lasts for 150 min !! Is it really necessary to have it on for this length of time?

  6. avatar says

    That’s a ridiculous amount of time Steve. Washers should have a proper maintenance wash cycle by now. I would let the machine do the wash when using it for a maintenance wash to clean the washer and when it’s emptied the boiling water out and done one rinse I’d abort the program which has done its cleaning job. It’s not perfect solution but should save 20 minutes or more.

  7. avatarSteve Parrett says

    Thanks for guidance. I did that by aborting the 90 degree wash after 30 min and changing programme to ‘spin/drain’ with no spin option, ie: draining water. Seems to be satisfactory.