How To Clean Pee Stains Off a Mattress: Simple Steps That Work

If you’re searching for how to clean pee stains off a mattress, you’re likely dealing with a fresh accident, a lingering odor, or a yellow stain that won’t seem to fade. This guide walks you through what to do step by step, how to handle dried stains, and what to avoid so you don’t damage your mattress.

What Happens When Pee Gets on a Mattress?

Urine can soak beneath the surface fabric into the comfort layers, leaving:

  • Visible yellow stains
  • Lingering odors
  • Possible stiff or discolored spots over time

Because most mattresses can’t be machine washed, quick action and the right method are the keys to lifting stains and reducing odor.

How To Clean Pee Stains Off a Mattress (Fresh Stains)

Step 1: Act Quickly and Blot, Don’t Rub

  1. Remove bedding right away.
  2. Use clean, dry towels or paper towels to blot up as much liquid as possible.
  3. Press firmly; avoid scrubbing, which can push urine deeper into the mattress.

Step 2: Apply a Gentle Cleaning Solution

A common approach uses everyday household ingredients:

  • Mix equal parts cool water and mild liquid soap, or
  • Use a diluted white vinegar and water solution (often about 1:1)

Lightly spray or dab the solution onto the affected area. You want it damp, not soaked, to avoid saturating the mattress.

Step 3: Blot Again and Absorb Moisture

  • After a few minutes, blot thoroughly with clean towels.
  • Sprinkle baking soda over the damp area to help absorb moisture and reduce odor.

Let the baking soda sit for several hours, or until completely dry, before vacuuming it up.

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

Dried urine can be more stubborn because it has had time to set into the fabric and foam. You can still improve the stain and odor with a bit more effort.

Step 1: Lightly Re-Dampen the Stained Area

  • Use a spray bottle with cool water to slightly re-dampen the stain.
  • This can help loosen dried residue so it can be lifted out more effectively.

Step 2: Use a Stronger Cleaning Mix

Some people find a mix of:

  • Water
  • A small amount of mild detergent
  • Optionally, a small amount of white vinegar

helps break down dried stains. Apply lightly and blot slowly, working from the outside of the stain inward to avoid spreading.

Step 3: Odor-Focused Treatment

After cleaning, cover the area generously with baking soda and leave it overnight.
The next day, vacuum thoroughly using a clean upholstery attachment to remove the powder.

Multiple rounds may be needed for older or darker stains, but each pass often improves both color and smell.

Is It Safe to Use Bleach or Harsh Cleaners on a Mattress?

In most cases, bleach and strong chemical cleaners are not recommended for mattress surfaces. They can:

  • Damage fabrics or discolor the cover
  • Leave strong, lingering odors
  • Be harsh on the materials inside the mattress

Instead, mild, water-based solutions are usually safer for regular cleaning and spot treatments. Always test any solution on a small hidden area first to check for discoloration or damage.

How Do I Dry the Mattress After Cleaning?

Proper drying matters just as much as cleaning:

  • Let the mattress air dry completely before putting sheets back on.
  • Open windows or use a fan to improve airflow.
  • If possible, prop the mattress up to allow air to reach all sides.

Avoid using high heat directly on the mattress surface, as it may affect certain materials.

Can Pee Stains Be Fully Removed Every Time?

Results can vary. Fresh stains are usually much easier to treat than ones that have been there for days or weeks. Some light yellowing may remain, especially on older mattresses, but many people find:

  • Odor can often be greatly reduced
  • Stains usually fade significantly with proper cleaning
  • A waterproof mattress protector helps prevent future issues

If a stain or odor does not improve after several careful cleanings, that can be a sign the urine has soaked more deeply than surface treatments can reach.

✅ Quick Mattress Takeaways

Key points about how to clean pee stains off a mattress:

  • Act fast: Blot fresh urine immediately; do not rub.
  • Use gentle cleaners: Mild soap and water or diluted vinegar and water are common choices.
  • Avoid oversoaking: Lightly dampen the area; too much liquid can push urine deeper.
  • Tackle odor: Baking soda is widely used to absorb smells and leftover moisture.
  • Be patient: Older stains may need multiple treatments to improve.
  • Skip harsh chemicals: Bleach and strong cleaners can damage mattress materials.
  • Dry thoroughly: Allow enough time and airflow before making the bed again.
  • Protect for next time: A washable, waterproof protector can make future cleanups much easier.

With these steps, you have a clear, practical approach for how to clean pee stains off a mattress and keep your sleeping surface fresher and more comfortable.