You pulled the drawer out to top up the detergent and found something you were not expecting. Grey sludge in the softener compartment, black flecks round the rim, a smell somewhere between damp and sweet. It has probably been like that for months.
Nothing is broken. A permanently wet tray with detergent sitting in it will always end up this way. The scrub is the easy part. The question worth answering is why it comes back.
What the sludge actually is
Four things, mixed together, in roughly this order of volume.
Detergent that never left. The drawer is flushed by a fixed spray of water. The dose is not fixed - it is whatever you poured. When the dose outruns the flush the surplus stays behind, and powder is worst in cool washes where there is no warmth to dissolve it on the way through.
Fabric softener. The worst of the four by some distance. Softener works by depositing a waxy film on fabric - that is the mechanism, not a side effect - and the dispenser gets coated the same way your towels do. It is why the softener side goes grey and slimy while the detergent side only goes crusty.
Limescale. Most of Ireland sits on limestone, so most Irish households wash in hard water. Uisce Éireann is blunt about the effect: hard water "can also reduce the effectiveness of detergents and soaps, meaning you need to use more." More detergent, same flush, more left behind. You can check your supply by Eircode in fifteen seconds.
Mould. Which turns up last and lives on the other three. The black spotting is the visible part.
Getting the drawer out
Most people scrub what they can reach with the drawer still in the machine, which is why it never really goes away. Almost every drawer lifts out. Pull it open to its stop, press the tab or coloured release in the middle of the softener compartment, and keep pulling.
- Soak it in the hottest water your tap gives you for fifteen minutes - that does most of the work.
- Take out the softener siphon - the small plastic cap or tube - and clean it separately. A blocked siphon is why softener sits in the tray after a finished wash.
- Scrub with an old toothbrush, into the corners and under the siphon housing, not just the flat faces.
- For scale, soak it in white vinegar for half an hour first. Vinegar dissolves limescale, but it is not a disinfectant at that dilution and will not shift mould.
- Dry it before it goes back in.
The roof of the cavity is the part that matters
With the drawer out, look up into the empty slot with a torch. The underside of the housing is where the water jets sit, and it is usually furred with black growth, often worse than the drawer itself. Nobody cleans it because nobody sees it.
Wipe it with a cloth wrapped round a finger and clear any blocked jets with a cocktail stick. A blocked jet means a weaker flush, a weaker flush means more residue, and more residue blocks more jets. That loop is why the drawer is black again six weeks later. Leave it ajar between washes so the cavity dries, the same principle as the door - covered properly in why a washing machine starts to smell.
Why it keeps coming back, and how to stop it
Because the inputs have not changed. Two of them you can fix this week: cut the fabric softener, and size the dose on purpose rather than filling the cap by eye. The third is the format, and that is where we have a commercial interest, so read on with that in mind.
A detergent sheet does not go in the drawer at all. It goes into the empty drum, before the clothes, and the drawer stays dry. Not cleaner - dry. A compartment with nothing wet in it does not grow anything.
The usual objection is that a thin dry strip cannot clean like a proper liquid dose. That is fair to doubt. What is in the sheet is the same class of chemistry as what is in the bottle, minus the water it was carried in, and it is dosed by being one sheet rather than by how full the cap looked. On set-in stains, a damp corner of the sheet rubbed into the mark beats any pod, because no format shifts a set stain unaided.
The other objection is residue, and that is nearly always a loading error. The sheet goes into the empty drum first - never the drawer, never on top of a packed load. Where to put laundry detergent settles it for every format, and how laundry detergent sheets work covers the film itself.
Now the awkward part. Our sheets contain no builder and no water softener - no zeolites, no citrates, no sodium carbonate. In a hard-water area that is a real gap, and a built powder has the advantage on that specific axis. What a sheet has instead is a perforation: tear extra for limestone country, tear less for a small load. If your water is genuinely hard, add washing soda to the drum alongside the sheet - how to soften water for laundry has the dose. The powder's answer to hardness is an insoluble mineral that is itself a residue source, which is an odd thing to add to a machine you are trying to keep clean.
Questions people actually ask
how do i clean my washing machine drawer
Pull the drawer out of the machine, soak it in the hottest tap water you have for about fifteen minutes, then scrub the compartments and the removable softener siphon with an old toothbrush, using white vinegar first if there is limescale, and wipe the roof of the empty cavity before you refit it dry.
why is there black stuff in my washing machine drawer
The black deposits are mould, growing on a mix of undissolved detergent, fabric softener film and limescale that the drawer never fully flushes away, kept alive by the fact that the compartment stays damp between washes and never gets hot enough to kill anything. Clean the cavity above it too.
how do i get my washing machine drawer out
Pull the drawer open until it stops, then press the release tab, arrow or coloured catch in the centre of the softener compartment and keep pulling it towards you, lifting the front edge slightly if your model asks for it. Check the manual before forcing anything, as a few drawers are fixed.
how often should i clean the washing machine drawer
Every couple of months suits most households, dropping to monthly if you use fabric softener or live in a hard-water area, which in Ireland means most of the country, though leaving the drawer slightly open between washes prevents more build-up than any increase in cleaning frequency will.
do laundry sheets go in the drawer
No. A laundry detergent sheet goes into the empty drum before you load the clothes, never into the detergent drawer, where it cannot dissolve or flush through properly and will streak the wash - and loading it into the drawer is the single most common cause of residue complaints with sheets.
Where that leaves you
Clean the drawer and the cavity above it once, leave it ajar, and change what goes into it. If you want the drawer out of the equation altogether, our 60-pack of eco-friendly laundry detergent sheets goes into the drum, one per load, torn to size. It comes with a 30-day money-back guarantee, and a subscription can be cancelled any time by email or live chat - no fees and no notice period.