How To Clean a Mattress That Got Peed On: Step-by-Step FAQ Guide

If you’re searching for how to clean a mattress that got peed on, you’re usually dealing with an urgent, messy situation. This guide walks you through what to do right away, how to remove stains and odors, and how to handle dried or old urine spots—using simple household supplies most people already have.

What should I do first when a mattress gets peed on?

Acting quickly makes a big difference.

  1. Strip the bed immediately
    Remove sheets, mattress protector, and blankets. Wash them according to their care labels.

  2. Blot, don’t scrub
    Use clean, dry towels or paper towels to gently blot up as much urine as possible.
    Press firmly, but avoid rubbing, which can push liquid deeper into the mattress.

  3. Check how deep the stain goes
    If the mattress still feels very wet, you’ll need more time blotting before you move on to cleaning.

How To Clean a Mattress That Got Peed On (Fresh Stains)

Once you’ve removed as much liquid as possible, you can treat the area.

Step 1: Apply a gentle cleaning solution

Use a mild, water-based solution that’s safe for fabrics and foam. A common option is:

  • Cool or lukewarm water
  • A small amount of gentle liquid soap or mild detergent

Lightly spray or dab the solution onto the stained area. Avoid soaking the mattress; the goal is to lightly dampen the top layers.

Why not hot water?
Very hot water can sometimes set stains and odors, making them harder to remove.

Step 2: Blot again

After applying the cleaner:

  • Blot with a clean, dry cloth to lift out moisture and residue
  • Rotate to dry areas of the cloth as they become damp

Continue until the area feels only slightly damp.

Step 3: Use baking soda for odor and moisture

Sprinkle a generous, even layer of baking soda over the affected area. Baking soda helps with:

  • Reducing lingering odor
  • Absorbing remaining moisture

Leave it on for several hours, ideally overnight, to be more effective.

Step 4: Vacuum thoroughly

Once the baking soda is completely dry:

  • Vacuum slowly over the treated area
  • Go over the spot a few times to pick up all the powder

The mattress should now look and smell noticeably better.

How do I clean a mattress that has dried or old urine stains?

Cleaning dried urine is a bit more challenging, but you can still improve stains and smell.

Step 1: Lightly re-dampen the area

Use a spray bottle to lightly mist the stained area with cool water. This can help loosen dried residue so cleaners can work more effectively. Avoid over-wetting.

Step 2: Apply a suitable cleaner

Use a gentle solution designed for fabric or upholstery, following the instructions carefully. Always patch test a small, hidden area of the mattress first.

Work in stages:

  • Apply a small amount of cleaner
  • Gently blot
  • Repeat as needed rather than applying too much at once

Step 3: Deodorize with baking soda (again)

As with fresh stains, baking soda can help:

  • Cover the slightly damp area with a thick layer
  • Leave it for several hours
  • Vacuum thoroughly

Some old stains may not disappear completely, but they often become much less visible and less noticeable in smell.

Is it safe to use vinegar, hydrogen peroxide, or strong cleaners?

Many people wonder about home remedies when learning how to clean a mattress that got peed on.

  • Vinegar: Often used in home cleaning, but the strong smell can linger, and it may not be suitable for all mattress materials.
  • Hydrogen peroxide: Can have a lightening effect on fabrics and may discolor some mattresses.
  • Strong chemical cleaners: Some can be too harsh and might damage fabrics, foams, or covers.

Because mattress materials vary, it’s important to:

  • Check care tags or manufacturer guidelines
  • Test any cleaner on a small, hidden area first
  • Use gentle, fabric-safe products whenever possible

How can I dry the mattress properly after cleaning?

Drying matters just as much as cleaning.

  • Increase airflow: Open windows, use fans, or place the mattress where air circulates well.
  • Let it dry completely: The surface should feel fully dry before you put sheets back on.
  • Avoid direct high heat: Very high heat from hair dryers or heaters can be harsh on certain materials.

If possible, give the mattress several hours of drying time to help prevent musty smells.

How do I help prevent future accidents?

While they can’t always be avoided, some simple steps may limit damage:

  • Use a water-resistant or waterproof mattress protector
  • Clean up accidents as soon as possible
  • Keep spare sheets and protectors handy for quick changes at night

✅ Quick Mattress Takeaways

Key points about how to clean a mattress that got peed on:

  • Act fast: Strip bedding and blot urine immediately to limit staining and odor.
  • Blot, don’t scrub: Rubbing can push urine deeper into the mattress.
  • Use gentle cleaners: Mild, water-based solutions are generally suitable for most mattress fabrics.
  • Rely on baking soda: It helps with both moisture and odor and is easy to vacuum away.
  • Tackle dried stains patiently: Lightly re-dampen, then clean in stages rather than oversoaking.
  • Patch test products: Especially with stronger or unfamiliar cleaners.
  • Dry thoroughly: Good airflow and enough time are important to keep the mattress fresh.
  • Protect the mattress: A washable protector can make future cleanup much easier.

With calm, steady steps and common household supplies, most people can meaningfully improve both the look and smell of a mattress that has been peed on.