How To Clean Urine In Mattress: Simple Steps That Actually Work

If you’re searching for “How To Clean Urine In Mattress”, you probably need a clear, fast, and reliable method to deal with an accident. Whether it’s from a child, pet, or an unexpected leak, urine can leave odors, stains, and moisture trapped deep in the mattress if not handled correctly.

This guide explains exactly how to clean urine from a mattress, what to use, what to avoid, and how to reduce lingering smells.

What Happens When Urine Gets in a Mattress?

Mattresses are made of layers of foam, fabric, and padding that absorb liquid quickly. When urine soaks in, it can:

  • Leave visible yellow stains
  • Cause a strong, lingering odor
  • Attract bacteria and odors over time if not cleaned

Acting quickly usually makes cleaning easier, but older, dried stains can still be improved with the right steps.

How To Clean Urine In Mattress: Step‑by‑Step

1. Blot Up Fresh Urine (Don’t Rub)

If the stain is fresh:

  • Use clean, dry towels or paper towels
  • Press firmly to soak up as much liquid as possible
  • Avoid scrubbing, which pushes urine deeper into the mattress

The more you remove now, the less you need to clean later.

2. Mix a Gentle Cleaning Solution

A commonly used option is:

  • 1 part mild liquid soap (or small amount of gentle detergent)
  • 3–4 parts cool water

You can add a small amount of white vinegar if your mattress care label allows it, as many people find it helps with odor.

Pour the solution into a spray bottle if you have one. Avoid soaking the mattress.

3. Lightly Clean the Stained Area

  • Lightly spray or dab the solution onto the stain
  • Let it sit for 5–10 minutes
  • Blot again with a clean, dry cloth or towel

The goal is to dampen, not drench. Too much liquid can be hard to dry and may cause lingering dampness.

4. Use Baking Soda for Odor and Moisture

Baking soda is often used because it can help:

  • Absorb moisture
  • Reduce urine odors

Sprinkle a generous layer of dry baking soda over the treated area. Gently press it in with your hand.

Leave it on for at least several hours, and if possible, overnight for deeper stains.

5. Vacuum Thoroughly

Once the baking soda is completely dry:

  • Use a vacuum with an upholstery attachment
  • Slowly vacuum up all the baking soda
  • Repeat if needed

If the stain or odor remains, you can repeat the cleaning process once more.

How Do You Clean Dried or Old Urine Stains?

Dried urine can be more stubborn, but you can often lighten the stain and reduce odor with a slightly stronger approach.

Extra Tips for Old Stains

  • Lightly re-dampen the area with water and gentle soap before adding baking soda
  • Allow more soak time (10–15 minutes) for the cleaning solution
  • Apply baking soda and leave it overnight or longer, if possible

Some people also use an enzymatic cleaner designed for fabric and upholstery, which is often used for pet stains. Always test a small hidden area first and follow the instructions on the label.

Can You Use Bleach or Harsh Chemicals?

For most mattresses, bleach and harsh chemicals are not recommended because they can:

  • Damage the fabric and foam
  • Leave strong chemical odors
  • Potentially discolor the surface

Check your mattress care tag and follow any cleaning warnings or restrictions it lists. When in doubt, stick to mild cleaners and baking soda.

How Do You Get Rid of the Smell Completely?

If you’ve followed the main cleaning steps and still notice an odor:

  • Ensure the mattress is fully dry; dampness can trap smells
  • Repeat the baking soda treatment on the affected area
  • Give the mattress good airflow: open windows, use a fan, or place it in a well-ventilated room

Persistent odors may take more than one round of cleaning to noticeably improve, especially if the urine has penetrated deep into the mattress layers.

How Long Does It Take for a Mattress to Dry?

Drying time depends on:

  • How much liquid soaked in
  • Room temperature and air circulation

General tips:

  • Allow at least 8–24 hours for full drying
  • Use fans or place the mattress near an open window
  • Avoid putting bedding back on until the mattress feels completely dry to the touch

Sleeping on a damp mattress can trap moisture and may lead to ongoing odor issues.

How Can You Prevent Future Urine Stains?

While accidents can’t always be avoided, you can:

  • Use a water‑resistant mattress protector
  • Add an extra washable cover or pad on top for children or pets
  • Clean small accidents promptly before they spread

Protective covers are commonly used in homes where spills and accidents are likely, because they help keep the mattress itself cleaner over time.

✅ Quick Mattress Takeaways

Key points to remember about How To Clean Urine In Mattress:

  • Act fast: Blot fresh urine immediately to reduce staining and odors.
  • Use gentle cleaners: Mild soap and water, plus baking soda, are widely used and mattress-friendly options.
  • Avoid soaking: Too much liquid can make drying difficult and trap odors.
  • Baking soda helps: It can absorb both moisture and smell when left on for several hours or overnight.
  • Vacuum well: Remove all baking soda once dry to leave the surface clean.
  • Repeat if needed: Older or deeper stains may require more than one cleaning round.
  • Protect the mattress: A washable cover or protector can make any future accidents easier to manage.

Handled calmly and methodically, even a serious spill can usually be improved. Understanding how to clean urine in a mattress gives you a practical way to restore your sleep surface and keep it fresher for longer.