How To Clean Urine From Foam Mattress? (7 Simple Steps)

Have you ever woken up one morning and seen a urine stain on your beloved bed? Before you panic and consider purchasing a new mattress, follow my guide on how to clean urine stains from a foam mattress. Let’s check!

How To Clean Urine Stains From Foam Mattress?

I have a 2-year-old child, and these accidents frequently happen in our household. Nobody wants to sleep on a bed that smells like urine. If not cleaned promptly, urine can seep into the foam, causing odors and potential bacteria growth. Let’s work together to solve this problem!

What you need:

  • Clean absorbent cloths or paper towels
  • Baking soda and cornstarch
  • Water and white vinegar mixture
  • A vacuum cleaner with an upholstery attachment
  • A spray bottle filled with the water and white vinegar mixture
  • A few drops of liquid dish soap

What you do:

Step 1: Remove bedding

First, remove all the bedding. It might not be the most glamorous task, especially if you’re not a morning person like me. But it’s essential to prevent further spreading of the stain and to give you easier access to the mattress.

Step 2: Blot the urine

Now, grab a clean, absorbent cloth (or paper towel) and gently blot the affected area. Make sure to blot the area instead of rubbing it to avoid pushing the urine deep into the foam, making it harder to remove later. Patience is key here.

Step 3: Absorb remaining moisture

To ensure that we remove as much moisture as possible, sprinkle some baking soda or cornstarch on the stained area. These powders are fantastic at absorbing liquid and will help lift the remaining odors. Allow it to sit for approximately 15-20 minutes, which is enough time for you to make a quick cup of coffee or tea.

Step 4: Vacuum the baking soda or cornstarch

Read more: How To Clean Mattress Without Vacuum: 4 Helpful Hacks

Vacuum up the baking soda or cornstarch from the stained area before moving on to the next step. You can use the upholstery attachment or a handheld vacuum to suck up the baking soda or cornstarch gently. If your vacuum has adjustable suction power, keep it on a lower setting to avoid damaging the foam.

Step 5: Cleaning

Now, let’s address the stubborn stain on the mattress. I often prepare a cleaning solution by mixing equal parts water and white vinegar, such as 1 cup of water and 1 cup of white vinegar. Then, I spray the mixture on the stain and use the blotting technique with a clean cloth or paper towel to lift the stain. If it is particularly persistent, I’ll add a drop or two of liquid dish soap to the solution for extra cleaning power.

Note: After cleaning, the mattress should be rinsed with clean water and then thoroughly dried.

Step 6: Air dry the mattress

We’re almost there! You must let it air dry completely before putting any bedding back on. You can prop it against a wall or place it in a well-ventilated area with good airflow. If the weather cooperates, you can even take it outside to dry in the sunshine.

Step 7: Deodorize the mattress (optional)

If you’re like me and want your bed to smell fresh, this optional step is for you. I often sprinkle baking soda over the entire surface and wait a few hours or overnight for a better result. Then, I left for a few hours or overnight and then vacuumed up to remove the baking soda residue.

What Are Notes When Cleaning Urine From Foam Mattress?

Keep these essential notes in mind when performing the above steps. If you are not careful and ignore these notes, your bed will become worse.

Moisture damage

These mattresses are like sponges – they soak up liquids, and if I’m not careful, it could lead to damage. It can seep deep into the foam and cause nasty issues like mold and mildew growth if I go all out with water during this process. So I’ll gently blot the stain with a clean cloth or paper towel.

Plus, high heat during vacuuming is a no-go – it can ruin the foam. Proper drying time is also crucial. I don’t want any musty odors or potential damage.

Read more: What Happens When You Spray Rubbing Alcohol On Your Mattress

Test cleaning solutions in an inconspicuous area

When removing that urine stain from my mattress, testing the cleaning solution in an inconspicuous area is my secret weapon. These mattresses are sensitive and different materials might react differently to cleaning agents. So, to avoid any disasters, I always play it safe.

I often pick a hidden spot on the bed (a corner or under the edge) and apply a small amount of the cleaning solution. I let it sit for a minute or two and then blot it with a clean cloth. If everything looks good, I’ll continue my work! So remember, before cleaning, play it safe and do a quick test in an inconspicuous area.

Chemical sensitivity

Some people can be sensitive to certain cleaning agents or chemicals. That’s why I opt for a gentle cleaning solution of water, white vinegar, and dish soap. These are milder options that are less likely to cause irritation or discomfort. I recommend wearing gloves and working in a well-ventilated area to minimize potential exposure. By being mindful of chemical sensitivity, not only are you protecting your health, but you’re also creating a safer environment for your family and guests.


Above is my ultimate guide on how to clean urine from foam mattress in 7 simple steps! Remember, it’s all about blotting, not rubbing, and being cautious about moisture damage and chemical sensitivity. Furthermore, it is recommended to use a waterproof mattress cover to prevent urine stains and protect the mattress from future accidents.