You're standing at the machine with a full cap of detergent and an open drawer with three compartments, none of them labelled in any language you speak. Pour it into the wrong one and nothing dramatic happens, which is exactly the problem. The cycle finishes, the clothes come out looking fine, and you never learn that the detergent left the machine before the wash properly began.
The drawer is a schedule, not a tray
The single most useful thing to know is that the drawer is a timing mechanism. Your machine flushes each compartment with water at a different moment in the cycle: one at the very start, one when the main wash begins, one at the final rinse. Where you put a product decides when it enters the drum. Get that wrong and a perfectly good detergent arrives at the wrong time, or a softener is rinsed away long before the rinse it was designed for.
Once you hold it that way round, the compartments stop being arbitrary.
Reading the symbols
Most machines use a version of the same code, whatever the brand. The compartment marked II, or sometimes 2 or B, is the main wash. That is the one for detergent on a normal cycle. The compartment marked I, or 1, or A, is the pre-wash, and it is only used if you select a pre-wash programme; on every other cycle, anything in it is either flushed uselessly at the start or sits there going crusty. The small compartment marked with a flower is for fabric softener, held back until the final rinse. It has a MAX line for a reason: it empties by siphon, and overfilling it makes the softener drain straight through at the start of the cycle instead.
It depends what you're holding
Powder is the simple case. Drawers were designed for it. Main wash compartment, and the machine does the rest. If you run a pre-wash for a heavily soiled load, powder can go in the pre-wash compartment too.
Liquid is more contested than the bottle admits. The drawer's main compartment does work, but liquid is runny where powder is not, and in some machines it seeps through to the drum while the programme is still waiting to start, especially on a delayed start. That is why liquid brands sell dosing balls: fill it, sit it on top of the clothes at the back of the drum, and the detergent is released where and when the water arrives. The dosing ball is, in effect, the manufacturer conceding that the drawer was designed for a different product.
Pods never go in the drawer. They need to tumble in water to dissolve, and a drawer cannot do that; a pod in the drawer dissolves partway and drips into the drum as a stripe of gel. Pods go at the back of the empty drum, before the clothes go on top. Pods fixed liquid's dosing problem and kept the plastic, which is roughly the whole story of the format; we've compared sheets and pods head-to-head if you're weighing them.
Detergent sheets go in the empty drum first, before the clothes go on top. Not the drawer, because a sheet needs water contact and tumbling to dissolve and the drawer provides neither, and not thrown on top of a full load, where it can end up folded dry inside a duvet cover. Empty drum, sheet, then clothes. They dissolve at whatever temperature the machine provides, including cold; temperature is a separate question, and mostly not the one people think.
Top loaders play by different rules
If your machine loads from the top and has no drawer, the order is: start the water, add the detergent, then add the clothes. Letting the detergent dissolve in the incoming water first means nothing sits undissolved in a fold of fabric. Many newer top loaders and HE machines do have a dispenser drawer, and if so, the same compartment logic applies as on a front loader.
The mistakes that actually matter
Four cover nearly everything. Softener in the main compartment washes through the clothes at the start of the cycle and drains away, so the load is washed in softener and finished without it, the reverse of the intention. Detergent in the pre-wash compartment on a normal cycle means the machine washes your clothes with plain water. Pods and sheets in the drawer never dissolve properly, which is where most residue complaints about both formats come from. And overdosing, the most common mistake of all, leaves residue in the fabric and, over time, in the machine itself, whichever compartment you use. More detergent does not mean cleaner clothes; it means more of everything left behind.
If your machine has developed a smell, the drawer itself is a suspect. Softener and detergent residue build up in the channels behind it. Pull the drawer fully out every month or two and rinse it under a tap.
No machine at all
For hand washing, dissolve the detergent completely in the water before the clothes go in. Swirling a garment around a still-dissolving blob of liquid or powder concentrates it in one patch of fabric, which is how hand-washed clothes end up with pale streaks.
Or make the question disappear
One observation, offered with an obvious interest: the entire compartment question only exists for products that need routing. A detergent sheet doesn't. Ours is a dry, perforated sheet, sixty to a pack. Tear one off, drop it in the empty drum, load the clothes on top. One sheet per full load, front loader, top loader or HE, 30 to 60 degrees or cold, machine or basin. There is no drawer to decode, no dosing cap to eyeball, no residue channel to scrub, and nothing to siphon early or seep through on a delayed start. The drawer is a workaround for formats that can't simply sit in the drum. This one can.
If you'd rather test that than take it on trust: 30-day money-back guarantee. If the sheets don't clean as well as what you use now, email us and we'll refund you. Subscriptions cancel any time by email or live chat, with no fees and no notice period. Try the sheets. Next-day delivery in Ireland, two days to the UK.
The questions people actually ask
Where do you put laundry detergent in a washing machine?
Powder goes in the main wash compartment of the drawer, marked II, 2 or B. Liquid goes in the same compartment or in a dosing ball in the drum. Pods and sheets go in the empty drum, before the clothes.
Where do you put laundry liquid?
Either the main wash compartment of the drawer or a dosing ball placed in the drum. The drum route avoids liquid seeping through the drawer before the cycle starts, which matters most if you use a delayed start.
Can you put laundry detergent straight in the drum?
Yes. Liquid in a dosing ball, and pods and sheets by design. Powder is the one to keep in the drawer, because loose powder in the drum can sit undissolved in folds of fabric, particularly on cold, short cycles.
Where do you put laundry detergent sheets?
In the empty drum, before the clothes go in. Never the detergent drawer, and not on top of a full load. Those two errors cause nearly all residue complaints about sheets.
Which compartment is for fabric softener?
The smallest one, marked with a flower. Fill it only to the MAX line. Past that, the siphon empties the softener into the drum at the start of the cycle instead of the final rinse.
What is the pre-wash compartment for?
Marked I, 1 or A, it is used only when you select a pre-wash programme for heavily soiled loads. On a normal cycle, leave it empty.