Why Do Foam Mattress Toppers Turn Yellow?

Your mattress topper could be yellow because of sweat, urine, or other body fluids and you can remove it by cleaning and disinfecting the area.

If you have ever had yellow stains on a memory foam topper, you know how frustrating it can be, and here, we have provided a few tips on removing them.

There are different ways you can clean your yellow stain and one is using warm water to spot clean the stain in the early stage.

But, if the stain is still visible, you would need a more robust cleaning solution.

Do Foam Mattress Toppers Turn Yellow?

Your Foam Mattress Toppers can turn yellow if you do not clean your beddings.

How can you prevent your toppers from turning yellow?

  • Use a breathable mattress topper to keep moisture from building up underneath the topper, causing it to turn yellow.
  • Keep your topper clean by vacuuming it regularly and spot-cleaning it when necessary.
  • If your topper does start to turn yellow, you can try using a bleaching agent to remove the stains. Just follow the directions on the package carefully, so you do not damage the topper.

Why Do Foam Mattress Toppers Turn Yellow?

Body oil is one of the most common reasons Foam Mattress Toppers Turn Yellow. If you sleep on your topper without any sheets or other barriers between you and the topper, your body oil can seep into the topper and cause it to turn yellow.

Another possible reason for a yellow topper is sunlight exposure. If you place your topper in direct sunlight, the UV rays can cause it to discolor. If you notice that your topper is yellowing, you may want to try moving it to a different location in your bedroom to see if that makes a difference.

How do you get the yellow out of a memory foam mattress?

  • Clean your yellow mattress topper in your washing machine using cold water and mild detergent.
  • After applying the solution, let it sit for a few minutes before blotting it up with a clean cloth. 
  • Rinse the area with clean water and allow the topper to air dry.

If the yellow stain persists, you can try using the methods below to remove it.

Method 1: Spot cleaning

  1. Try spot cleaning the topper with white vinegar and water solution.
  2. Mix equal vinegar and water in a spray bottle and mist the solution onto the stained area.
  3. Let it sit for a few minutes, then dry it with a clean towel.

Method 2: Using a mild Bleach Solution 

If your memory foam topper has started to yellow, and you have tried using the spot clean method, but it yields no result, then you can try this out.

  1. Use a mild bleach solution on the topper. Mix one teaspoon bleach with 1 quart of water and mist it onto the stained area.
  2. Let it sit for a few minutes, then dry it with a clean towel.
  3. Use a more robust bleach solution if the stain is still there. Mix one tablespoon bleach with 1 quart of water and mist it onto the stained area.
  4. Let it sit for a few minutes, then dry it with a clean towel.
  5. Ensure to follow the instructions on the bleach bottle and always test the mixture on a small area of the topper first to ensure it doesn’t damage the material.

How to stop your mattress from turning yellow

1. Use a mattress protector.

A mattress protector is a thin, often waterproof, cover that goes over your mattress and can help protect your mattress from spills, sweat, and other body fluids that can cause yellowing.

2. Keep your bedroom clean.

Dust and dirt can settle on your mattress and make it look yellow. So, it is essential to keep your bedroom clean. Vacuum your mattress regularly, and if it is starting to look yellow, you can try spot cleaning with mild detergent.


Is it okay to sleep on a Yellow memory foam topper?

No, if you notice any stain such as blood or urine on your mattress, ensure to clean it ASAP to prevent any further contamination.

However, memory foam toppers are naturally resistant to bacteria and dust mites, so it’s unlikely that your memory topper harbors any dangerous organisms.

To clean a stained memory foam topper, start by spot-cleaning with a mild detergent. If the stain is still visible, you can try using a more robust cleaning solution, like bleach or vinegar. Just be sure to rinse the topper thoroughly afterward to remove any residue.

Once your topper is clean, you can feel confident it’s safe to sleep on it. Memory foam is beneficial for people with allergies.

Can I use hydrogen peroxide to remove stains on my memory foam topper?

Hydrogen peroxide is a natural bleaching agent that can safely and effectively remove stains from your mattress topper without causing any damage. Apply hydrogen peroxide to the stained area and let it sit for a few minutes before wiping it away with a clean cloth.

Why does my husband’s pillow case turn yellow?

Your husband could be sweating heavily, causing his body oils to transfer to the pillowcase. Perhaps he is not washing his pillowcase often enough, allowing dirt and dust to accumulate.

Why is polyurethane foam yellow?

Polyurethane foam is yellow because of a combination of two chemicals, isocyanate and polyol. When these two chemicals react, they produce a yellowish gas. This gas is then condensed into a liquid and injected into the foam.

What does it mean when foam turns yellow?

When foam turns yellow, it usually means that it is starting to deteriorate and could be due to several factors, such as exposure to sunlight or chemicals or simply because it is old.

How do you make yellow foam white again?

You can make yellow foam white again with a little know-how and the right products.

Here is what you need:

  • Bleach
  • White vinegar
  • Baking soda
  • Hydrogen peroxide

Follow these steps to get rid of the yellow foam:

1. Soak the affected area in a solution of one bleach to ten parts water.

2. Rinse the area with white vinegar to neutralize the bleach.

3. Make a baking soda paste and hydrogen peroxide, and apply them to the yellow foam.

4. Let the paste sit for a few minutes, then scrub it off.

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