Washing at 30 or 40 degrees has become increasingly common. It saves energy, is kinder to clothes and is often recommended on laundry labels. At the same time, a question often appears in forums: can low temperatures mean that the laundry does not get really clean?
The answer is yes – in some cases.
Low temperature washes, but not everything
Modern detergents are adapted for lower temperatures and are able to remove common dirt. However, low temperatures have a harder time dissolving grease, skin deposits and bacteria completely.
This means that the laundry may look clean, but still contain residues that over time lead to odors or make the clothes feel stale.
Therefore, odors can occur despite clean laundry
When dirt and microorganisms are not completely washed away, they remain in the fibers. The next time the garment is used, when it becomes warm and humid again, odors can quickly develop.
It is especially common with:
– workout clothes
– underwear
– towels
– synthetic materials
Grease and detergent residue build up
Low temperatures do not dissolve grease as effectively. Skin oil, deodorant and detergent residue can therefore remain in both clothes and the washing machine.
Over time, it can lead to:
– gray or dull garments
– clothes that smell despite washing
– washing machine that starts to smell
When low temperature works well
Low temperature is often sufficient for:
– lightly soiled everyday clothes
– garments that are used for a short time
– clothing that is not exposed to sweat or moisture
The problems mainly arise when all washing is always done at a low temperature, without variation.
Why laundry benefits from variety
By occasionally washing at a higher temperature, you help both your clothes and your washing machine get rid of bacteria and deposits. It doesn't have to be every time, but regularly.
Many people find that both odor problems and gray deposits decrease when they vary the temperature.
Summary
Low temperatures are energy efficient and gentle, but in some cases can leave dirt, grease and bacteria behind. This can lead to odours, dull colours and garments that never really feel fresh.
A balanced washing routine, where low temperatures alternate with warmer washes, often gives the best results in the long run.
