How to Get Urine Out of a Mattress

Urine on a mattress is harder than the same accident on a carpet. The reason is simple: you can't lift a mattress and rinse it through. Whatever you put on has to come back off, or it sits in the foam and springs and turns into a worse problem than the stain.

So it's a balancing act. Enough treatment to reach where the urine went, little enough water that nothing stays trapped inside.

How do you get urine out of a mattress?

Blot hard, treat with an enzyme cleaner, then draw the moisture straight back out. The golden rule is never to soak it.

1. Blot up as much as you can with towels, pressing down firmly to pull it out of the surface.
2. Mist the area with cool water and blot again, to dilute the salts before they set.
3. Work in an enzyme cleaner, enough to reach as deep as the urine went, but applied rather than poured.
4. Leave it the full time on the label, usually ten minutes or more, so the enzymes can work.
5. Press dry with clean towels, then let the mattress air fully with a window open before you make the bed.

Skip the hairdryer and skip drenching it. Trapped moisture is what grows mould inside a mattress, and that's a far bigger job than the stain you started with.

If the accident has soaked past the surface, professional extraction with mattress sanitisation by size reaches the layers a towel never will.

How do you get the urine smell out of a mattress?

You have to break down the uric acid crystals. Ordinary cleaning only removes the part that rinses away.

Dried urine leaves crystals that don't dissolve in water, and those crystals pull in moisture from the air and release that sharp ammonia smell whenever the room turns warm or humid. So a mattress can seem clean for weeks, then announce itself on the first muggy night or once the heating comes on.

An enzyme treatment is the only home method that actually breaks those crystals down into something that rinses away. Everything else just masks the smell for a few days. Bicarbonate of soda helps a fresh accident by soaking up moisture, but on a set-in smell it only buys time.

Fresh and old accidents are almost two different jobs:

Can you fully remove old urine stains from a mattress?

Fresh accidents usually come out completely. Old ones are the hard cases.

Once a stain has been slept on and re-wetted a few times, the urine has spread well past the yellow mark you can see, deep into the ticking and the layers below, and a surface clean can't reach it. The smell is usually the stubborn part, more than the stain, and it's fair to say so upfront.

At that point a professional clean flushes the layers and sanitises the mattress using controlled moisture and proper extraction, so it comes out clean without being left wet inside. A king holds far more than a single, which is why the price runs by size.

Urine is only one of the marks a mattress collects. For the yellowing and the general spills, sweat and other mattress stains walks through the rest, since each one wants a slightly different treatment.