How much detergent is enough

Short answer: Most people use too much. Follow the dosage on the pack according to water hardness and load size, and halve the amount if the machine is only half full. That way clothes come out clean with no residue left in the fabric.

Too much leaves residue in the fabric

Detergent that is not rinsed out stays in the fibres. It makes fabric stiff and can itch against the skin, especially on clothes worn close to the body all day. The machine rinses with a fixed amount of water, and with too much detergent it cannot remove it all. You notice it clearly on bamboo undershirts for men.

Dosage depends on water hardness

Soft water needs far less detergent than hard water. The lime in hard water binds part of the detergent, so more is needed for the same effect. If you live somewhere with soft water, the lowest dose on the pack is often enough. Your local water supplier can tell you how hard the water is.

Half a load, half a dose

The dosage on the pack is for a full machine. If you wash only a small pile, you need correspondingly less. It sounds obvious, yet many people pour in the same amount every time, however much is in the drum. That is the quickest route to residue. See the long sleeve bamboo t-shirts.

How dirty are the clothes

Most clothes are not very dirty. Underwear, t-shirts and socks worn for a day mainly hold sweat and skin oils, which do not need a large dose. The higher dosage on the pack is meant for clothes with soil, food or visible stains. For everyday clothing the lower end is usually enough.

Signs of too much detergent

If clothes feel stiff or slightly sticky after washing, residue is often the cause. Other signs are foam still in the drum after rinsing, or a very strong scent. If clean clothes quickly smell again, built-up detergent may be to blame. Try reducing the amount for a few washes and see if it helps.

Measure instead of pouring

Use the dosing cap or a measuring scoop rather than pouring by eye. It is easy to use twice as much when pouring straight from the bottle. Once you have found the amount that suits your machine and your water, stick to it. Then the result stays the same from wash to wash.

Softener does not fix it

If clothes feel stiff after washing, it is tempting to add fabric softener. But that just puts another layer on top of the residue. The right move is to use less detergent so the fabric rinses clean. Clothes become softer by themselves once there is no detergent left in the fibres.

Small items need just as little

Socks and underwear take up little space, and a load of only those is rarely full. Match the dose to the amount, not to the type of clothing. Close-fitting pieces gain the most from a clean rinse, since they sit against the skin all day. See bamboo socks.

Frequently asked questions

How much detergent should you use

Follow the dosage on the pack according to water hardness, and halve it if the machine is only half full. For everyday clothes the lowest dose is often enough.

What happens with too much detergent

Residue stays in the fabric. It makes the fabric stiff, can itch against the skin and over time becomes a breeding ground for odour, even right after washing.

Does more detergent wash cleaner

No. Beyond a certain amount the result does not improve, and the excess ends up as a coating in the fabric instead of being rinsed away with the water.