How To Clean a Pee Stain Off a Mattress: Step‑by‑Step Guide & FAQ

If you’re searching for how to clean a pee stain off a mattress, you’re likely dealing with a fresh accident or a stubborn old spot. This guide walks you through simple, effective methods to remove urine stains and odors from most mattresses, using common household ingredients and practical steps.

What’s the Best Way To Clean a Fresh Pee Stain Off a Mattress?

Acting quickly makes a big difference. Fresh stains are usually much easier to remove than dried ones.

Step 1: Blot, don’t scrub
Use a clean, dry towel or paper towels to blot up as much liquid as possible. Press firmly, but avoid rubbing, which can push urine deeper into the mattress.

Step 2: Apply a mild cleaning solution
A common at-home mixture is:

  • 1 part white vinegar
  • 1 part cool water

Lightly spray or dab this solution onto the stained area. The vinegar helps break down urine components and reduce odor.

Step 3: Blot again
Use a clean, dry cloth to blot up the vinegar solution. Repeat gentle blotting until the mattress feels only slightly damp.

Step 4: Deodorize with baking soda
Sprinkle a generous layer of baking soda over the damp spot. This helps absorb moisture and reduce lingering smells.

Step 5: Let it dry completely
Allow the baking soda to sit for several hours, or ideally overnight. Good airflow and time are essential for a dry, fresh-smelling mattress.

Step 6: Vacuum thoroughly
Once dry, vacuum up all the baking soda. Check for any remaining odor or staining, and repeat the process if needed.

How Do You Clean Dried or Old Pee Stains From a Mattress?

Dried stains can be more stubborn, but they can often be improved significantly with patience.

1. Lightly re-wet the area
Use a spray bottle with a vinegar and water mixture (same 1:1 ratio). Lightly mist the stained area to help loosen dried residue. Do not soak the mattress.

2. Let it sit
Allow the solution to sit for 10–15 minutes so it can work into the stain.

3. Blot thoroughly
Use clean towels to press and absorb as much liquid as possible.

4. Add baking soda
Cover the area with a thick layer of baking soda and let it sit for several hours or overnight.

5. Vacuum and reassess
Vacuum up the baking soda and inspect. Some older stains may require more than one round of this process.

For very persistent odors, some people also use a small amount of mild, color-safe dish soap or a dedicated upholstery-safe cleaner, but always spot test first.

Can You Use Hydrogen Peroxide or Other Strong Cleaners on a Mattress?

Many DIY recipes for how to clean a pee stain off a mattress mention hydrogen peroxide. It can sometimes help break down tough stains, but there are important cautions:

  • Hydrogen peroxide may bleach or discolor fabrics and mattress covers.
  • It can also be harsh on some materials and weaken fibers over time.

If you choose to use it:

  • Use low concentration only.
  • Mix a small amount with water and a drop of mild dish soap.
  • Test on a hidden area first to check for discoloration.
  • Apply lightly, blot, then follow with baking soda and thorough drying.

Harsh chemical cleaners, solvents, or steam should be avoided on many mattresses, as they can damage foam, fabrics, or internal materials. When in doubt, check the care tag on your mattress for cleaning guidance.

How Do You Get Rid of Pee Smell in a Mattress?

Even when the stain looks gone, odor can linger if moisture remains trapped inside.

To reduce smells:

  • Use enough baking soda: A light sprinkle is often not enough. A thick, visible layer over the entire affected area works better.
  • Give it time: Leaving baking soda on for several hours or overnight allows better odor absorption.
  • Improve airflow: Open windows, use a fan, or let the mattress air out in a well-ventilated room.
  • Repeat if necessary: It can take more than one treatment for older or deeper odors.

Keeping the mattress as dry as possible going forward, and using a water-resistant mattress protector, can help prevent recurring odors from new spills or accidents.

Will Pee Ruin My Mattress?

A single accident usually does not permanently ruin a mattress if:

  • The stain is treated promptly.
  • Excess moisture is thoroughly blotted and dried.
  • Odor is addressed with proper cleaning and airing out.

However, repeated or untreated accidents can lead to:

  • Noticeable staining
  • Persistent odors
  • Possible breakdown of certain mattress materials over time

Regular cleaning, prompt attention to spills, and protective bedding can help extend the usable life of the mattress.

How Can I Prevent Future Pee Stains on My Mattress?

A few simple habits can make a big difference:

  • Use a washable, waterproof mattress protector
  • Keep an extra fitted sheet and protector on hand for quick changes
  • Address spills and accidents as soon as possible
  • Allow the mattress to dry completely before putting bedding back on

These steps help keep the mattress surface clean while making cleanup faster and less stressful.

✅ Quick Mattress Takeaways

Key points to understand about how to clean a pee stain off a mattress

  • Act fast for fresh stains: Blot, treat with a mild vinegar–water solution, then use baking soda and plenty of drying time.
  • Avoid over-soaking: Too much liquid can drive urine deeper into the mattress and slow down drying.
  • Old stains need patience: Re-wet lightly, blot, apply baking soda, let sit, and repeat if needed.
  • Be cautious with strong cleaners: Hydrogen peroxide and harsh chemicals can discolor or damage some mattress materials.
  • Odor control depends on drying: Thorough drying and generous baking soda are key to reducing smells.
  • Protection helps long term: A waterproof mattress protector and quick responses to spills help keep your mattress fresher for longer.

With these steps, how to clean a pee stain off a mattress becomes a manageable task rather than a disaster, helping you restore your bed to a cleaner, more comfortable state.