How to Remove Urine Stains – and the Smell

Why urine is two problems: stain and smell

Fresh urine is almost odourless. The problem starts as it dries: bacteria break down the urea and release ammonia – that is when the smell appears and the fabric can yellow. Urine also contains uric acid, which forms crystals that barely dissolve in ordinary water. A normal wash wets them but does not fully remove them – and as soon as it turns humid again, on a muggy day for example, the smell is reactivated. So urine is two jobs in one: the visible mark, and the odour source left behind.

Fresh urine stains – rinse cold at once

The quicker you are, the easier the job. The key is cold water – hot water sets proteins and locks the smell into the fibres.

1. Rinse the stain thoroughly under cold running water, ideally from the back of the fabric so you flush the urine out rather than further in.
2. Blot up liquid with a clean towel instead of rubbing – rubbing spreads the stain.
3. Soak the garment in cold water for a while before you move on to the enzyme treatment.
4. Do not tumble dry or put the garment on a hot radiator until the stain and smell are completely gone.

Enzymes are the key to uric acid and odour

What sets urine apart from most other stains is the uric acid – and ordinary detergent alone cannot handle it. An enzyme-based stain remover or a biological detergent, on the other hand, breaks down both the proteins and the uric-acid crystals that cause the smell.

• Use an enzyme product (often labelled 'biological' or 'enzyme') and give it plenty of time – several hours on an old stain.
• Enzymes work best in lukewarm, not hot, water; too high a temperature destroys them.
• Then wash the garment at the highest temperature the care label allows.
• Let the garment air-dry, ideally in the sun – UV light bleaches and removes odour naturally.

Old, dried-in and yellowed stains

If the stain has dried in, it needs more time and often several rounds. Soak it long in an enzyme product and repeat before you give up. On white fabric an oxygen-based bleach (oxygen bleach or sodium percarbonate) can lift yellowing – use it instead of chlorine. A little vinegar in the rinse neutralises alkaline ammonia odour, but test on a hidden area first. If both stain and smell persist, it is often because the uric acid is not fully broken down – another round of enzymes helps more than harsher chemistry.

What to avoid

Some 'shortcuts' actually make the damage worse or permanent. Steer clear of these:

• Hot water and the tumble dryer before the stain is gone – heat sets both protein and smell.
• Chlorine bleach, especially together with urine: ammonia and chlorine can form a dangerous gas, and bleach can yellow the fabric further.
• Hard rubbing, which spreads the stain and wears the fibres.
• Perfuming or softening over the smell without removing the uric acid – the smell comes back.

Send the garment to us

If the garment is valuable or delicate, or the smell lingers after several attempts, you can send it to us. We assess the fabric and the stain and choose a gentle method to suit the garment and its care label, so both the mark and the odour source are treated – not just the surface. We take in garments from all over Norway, and you order easily online. You see the price before you order.

Frequently asked questions