Hot? Warm? Cold?
Key Takeaways
- Choosing the right wash temperature helps clothes stay cleaner, last longer, and prevents stains from setting.
- Cold washes are ideal for everyday laundry, dark colours, and delicate fabrics.
- When in doubt, a 20°C wash is usually the safest and most effective choice for most garments.
Most of us select the same washing temperature every time without giving it much thought. But the temperature you choose can have a significant impact on how clean your clothes get, how long they last, and whether stains are removed—or become permanent.
Temperature isn’t just a number on a dial; it’s chemistry. Heat affects fabrics, dyes, oils, and stains in different ways. Choosing the wrong setting can shrink fibres, fade colours, weaken fabrics, or lock stains into clothing for good.
Understanding the Three Temperature Zones
Cold (20–30°C)
Cold washing is gentle on fabrics and should be your everyday go-to. It’s ideal for dark colours, delicates, wool, silk, and garments labelled “cold wash.”
Cold water helps protect fibres, minimise fading, and reduce wear and tear over time. For the best results, pre-treat stains and odours with Truly before washing.
Warm (40°C)
A 40°C wash is suitable for most cottons, synthetics, t-shirts, jeans, underwear, and activewear.
It’s warm enough to break down body oils, sweat, and everyday grime while still being gentle on fabrics. Think of it as the next step up when clothes have been working a little harder and need a deeper clean.
Most modern detergents are formulated to perform exceptionally well at this temperature.
Hot (60–90°C)
Hot washes are best reserved for towels, bed linen, tea towels, whites, and heavily soiled items.
Higher temperatures can help eliminate bacteria, allergens, and dust mites, making them particularly useful for allergy-prone households. However, heat can also damage certain fabrics, so always check care labels before selecting a hot wash.
A Simple Rule to Remember
Match the temperature to both the fabric type and the level of soiling.
When in doubt, 20°C is usually the safest choice for everyday washing. It’s gentle on clothing, effective for most loads, and helps extend the life of your wardrobe.
Less Time, Better Results
Longer wash cycles don’t necessarily mean cleaner clothes.
If you’ve pre-treated stains and soiled areas, shorter wash times are often more effective and gentler on fabrics. The less time your clothes spend being agitated in the washing machine, the better they’ll look and feel over the long term.
Expert Tip: Always pre-treat stains before washing. Heat can permanently set protein-based and tannin-based stains, making them far more difficult—or sometimes impossible—to remove later. A little attention before the wash can save a favourite garment from becoming a permanent casualty.
