How To Get Sweat Stains Out Of a Mattress: Simple Methods That Work

If you’re searching for “How To Get Sweat Stains Out Of a Mattress,” you’re not alone. Sweat stains are one of the most common mattress issues, especially on lighter fabrics. The good news: with the right approach, you can usually reduce or remove these yellow marks and freshen your mattress without harsh chemicals.

Below, you’ll find clear, step‑by‑step answers to the most frequent questions about sweat stains, odor, and long‑term mattress care.

What Causes Sweat Stains on a Mattress?

Sweat stains are typically yellowish or light brown patches that develop over time. They’re caused by:

  • Moisture from sweat
  • Natural body oils
  • Salts and other residues that soak into the fabric and foam

When this moisture isn’t cleaned, it can oxidize and discolor the mattress surface. Heat, humidity, and not using a protective cover often make the stains more noticeable.

How To Get Sweat Stains Out Of a Mattress: Step‑by‑Step

1. Start With a Dry Surface

Before using any cleaner, make sure the mattress is dry:

  • Strip all bedding and wash it according to its care labels.
  • If the stain is fresh and still damp, gently blot (don’t rub) with a clean, dry cloth to remove excess moisture.

2. Use a Mild Cleaning Solution

A simple, gentle solution generally works well on sweat stains. A common approach is:

  • Mix cool water with a small amount of mild liquid soap or a small amount of baking soda dissolved in water.
  • Lightly dampen (do not soak) a clean cloth or spray bottle with the mixture.

Why mild and minimal?
Mattresses don’t dry as quickly as sheets. Too much liquid can sink into the layers and be difficult to remove, which may lead to lingering odors.

3. Spot Clean the Stained Area

  • Gently dab the stained area with your cloth, working from the outside of the stain toward the center.
  • Avoid scrubbing aggressively; this can spread the stain or damage the fabric.
  • Let the solution sit for about 10–15 minutes if the stain is older.

4. Rinse With a Clean, Damp Cloth

  • Take a second cloth dampened with plain water.
  • Blot the area to remove any remaining cleaning solution.
  • Repeat until you no longer feel residue on the fabric.

5. Dry Thoroughly

  • Blot again with a dry towel to remove as much moisture as possible.
  • Allow the mattress to air-dry completely before putting sheets back on.
  • If possible, improve airflow with a fan or open window. Avoid direct high heat.

What If the Sweat Stain Is Old or Very Yellow?

Older sweat stains can be more stubborn, but you can often lighten them with repeated gentle cleanings.

Tips for older or set-in stains

  • Repeat the cleaning process above more than once.
  • Let the mild solution sit a bit longer before blotting (without over‑wetting).
  • Focus on lifting the stain slowly rather than expecting it to vanish in one attempt.

If the stain is purely cosmetic and does not affect sleep comfort or cleanliness, some people choose to cover it with a mattress protector and focus on preventing future stains instead of trying to erase it entirely.

How Do I Remove Sweat Smell From a Mattress?

Sweat can also leave a musty or stale odor, even after the visible stain has faded.

To help reduce odor:

  • Sprinkle dry baking soda evenly over the affected area.
  • Leave it on for several hours, or ideally overnight.
  • Vacuum it up with a clean upholstery attachment.

Baking soda can help absorb lingering smells and excess moisture from the mattress surface.

Will Sweat Stains Damage My Mattress?

Most sweat stains are primarily a cosmetic issue, but they can signal that your mattress is absorbing more moisture than ideal. Over time, this can:

  • Make the sleep surface feel less fresh
  • Contribute to general discoloration across the mattress
  • Shorten the “like-new” appearance

Using a washable mattress protector is one of the easiest ways to keep new sweat from soaking into the mattress layers.

How Can I Prevent Sweat Stains From Coming Back?

Once you’ve learned How To Get Sweat Stains Out Of a Mattress, it’s helpful to adjust your routine so they’re less likely to return.

Some simple habits:

  • Use a mattress protector: Choose one that’s removable and machine-washable.
  • Wash bedding regularly: Clean sheets and pillowcases can reduce the transfer of sweat and oils.
  • Air out your mattress occasionally: Strip the bed and let it breathe for a few hours.
  • Address spills and damp areas quickly: The sooner you blot and clean, the less likely a stain will set.

Is It Safe to Use Strong Chemicals or Heavy Moisture?

Many people wonder if they can use bleach or soak their mattress to tackle tough sweat stains. In general:

  • Strong chemicals may discolor or weaken mattress fabrics.
  • Excess water can sink into deeper layers, making drying difficult and potentially causing lasting odor.

For most mattresses, gentle, minimal-moisture cleaning is the safest approach. Always check any care notes that came with your mattress and spot test a small, hidden area first.

✔️ Quick Mattress Takeaways

Key points about How To Get Sweat Stains Out Of a Mattress

  • Blot, don’t soak: Use as little liquid as possible when cleaning a mattress.
  • Mild solutions are usually enough: Gentle soap and water or baking soda can help reduce sweat stains and odors.
  • Be patient with older stains: Set-in sweat marks may fade gradually with repeated light cleanings.
  • Dry time matters: Always let your mattress dry completely before remaking the bed.
  • Prevention is easier than removal: A washable mattress protector and regular bedding care can significantly reduce future sweat stains.

With a calm, step-by-step approach, you can usually refresh a sweat-stained mattress and keep your sleep surface looking and smelling cleaner over time.