Water hardness and the washing result

Sep 12, 2026

Short answer: Hard water contains limescale, which binds the detergent and builds up in the fabric. The result is stiff clothes, greyish whites and more detergent per wash. With the right dose and a clean machine, you can keep your clothes soft.

What hard water is

Water hardness describes how much lime and other minerals are dissolved in the water. The amount depends on where your water comes from, and it can vary a lot between areas. You cannot see the difference in a glass, but you can feel it in your clothes and see it in the machine and the kettle.

What hard water does to your laundry

The lime binds part of the detergent, so more is needed to get clothes clean. At the same time, it settles in the fibres of women's bamboo joggers and other clothes. Over time this makes the fabric less soft, and whites can turn greyish even when washed correctly every time.

Dose according to hardness

The dosing guide on the pack is based on water hardness, often listed as soft, medium and hard. Follow it, and items in bamboo sweatshirts for men come out clean without excess. Too little detergent does not clean well in hard water, and too much settles in the fabric and can leave a stiff surface.

Too much detergent is also a problem

It is tempting to add a little extra just in case. But any excess that is not used has to be rinsed out again, and that does not always happen. Detergent residue can make clothes stiff and cause them to smell once they warm up on the body. So measure instead of guessing.

Descale the machine

A descaler a few times a year keeps both the heating element and the drum free of deposits. When the machine is clean, detergent also rinses out of the clothes better, and the fabric feels softer. This also applies to bamboo socks and other small items, which easily turn stiff when lime and detergent remain.

Rinse thoroughly

An extra rinse can help if clothes feel stiff after washing. Many machines have a button for it. It flushes more lime and detergent out of the fibres. It is especially useful for thicker fabrics such as sweatshirts and joggers, where there is a lot of fabric that can hold on to residue.

Air dry and shake out

Air dried clothes can feel a little stiff straight after drying, especially in hard water. Shake them out well before hanging them up, and gently pull them into shape. Once dry, the fabric softens again as soon as you wear it. That is a better option than tumble drying, which wears the fibres and can cause shrinkage.

Signs that lime is a problem

Stiff clothes, white marks on dark fabrics and a greyish tone on whites are typical signs. So are lime deposits in the detergent drawer and a white edge in the rubber seal. If you see several of these, check your dosing and descale the machine before you change detergent or programme.