How To Clean a Memory Foam Mattress Topper With Urine: Simple FAQ Guide

If you’re searching for how to clean a memory foam mattress topper with urine, you’re likely dealing with a fresh accident or an old stain and want to remove both odor and discoloration without damaging the foam. This guide walks through what to do, what to avoid, and how to protect your topper in the future.

What’s the first thing I should do after a urine accident?

Acting quickly can make a big difference.

  1. Remove bedding right away. Strip sheets and any protectors so you can get to the topper.
  2. Blot, don’t rub. Use clean, absorbent towels or paper towels to press down firmly on the wet area. This helps pull urine out of the foam.
  3. Avoid soaking the topper. Memory foam is very absorbent. Too much liquid can be hard to dry and may leave a lingering smell.

The goal of this first step is simply to remove as much moisture as possible before you start cleaning.

Can you wash a memory foam mattress topper in a machine?

In almost all cases, no. Most memory foam toppers:

  • Are not designed for washing machines or dryers
  • Can tear, crumble, or lose shape when agitated or heated
  • May void warranties if machine washed

Instead, you should spot clean only, focusing on the area with urine.

How To Clean a Memory Foam Mattress Topper With Urine (Step-by-Step)

1. Blot the area thoroughly

  • Use dry towels to absorb as much urine as you can.
  • Stand or press firmly on the towels to help draw liquid out.
  • Replace towels as they become damp.

2. Apply a gentle cleaning solution

Many people use a mild solution that contains water and a small amount of gentle detergent or a light vinegar-and-water mix. Before you start:

  • Test a small hidden area of the topper to check for discoloration.
  • Use a spray bottle if possible to control the amount of liquid.

Lightly mist the stained area; do not pour liquid directly onto the foam.

3. Blot again

After applying the cleaning solution:

  • Let it sit for a few minutes to help break down the stain.
  • Blot the area again with clean, dry towels.
  • Repeat light spraying and blotting as needed, staying careful not to oversaturate.

How do I remove urine odor from a memory foam topper?

Once the visible stain is treated, odor can still remain. Many people find the following approach helpful:

  1. Use baking soda.
    Sprinkle a generous layer of dry baking soda over the affected area.

  2. Let it sit.
    Leave the baking soda on for several hours, or overnight if possible. This gives it time to absorb lingering moisture and smell.

  3. Vacuum thoroughly.
    Use a vacuum with an upholstery attachment to remove the baking soda. Move slowly to pull powder out of the foam surface.

If odor persists, you can repeat the baking soda step.

What about dried or old urine stains?

Old stains are more stubborn but can often be improved.

  • Rehydrate slightly. Lightly mist the area with your chosen cleaning solution (not plain water) to help loosen the dried residue.
  • Blot, then treat with baking soda. Follow the same pattern: gentle solution, blot, baking soda, vacuum.
  • Multiple light treatments are usually better than one heavy, wet cleaning, especially with memory foam.

How should I dry my memory foam mattress topper?

Proper drying is essential to avoid a stale smell.

  • Air dry only. Lay the topper flat in a well-ventilated room.
  • Use airflow. A fan can help speed up drying.
  • Avoid direct heat. Do not use a heater, hair dryer on high heat, or place the topper in direct intense sunlight for long periods, as this may affect the foam.

Make sure the topper is completely dry before putting sheets back on. Damp foam can hold odor and may feel uncomfortable.

Are there things I should never use on a memory foam topper?

Yes. To help protect the foam:

  • Avoid bleach or harsh chemical cleaners that may damage materials or leave strong residual odors.
  • Avoid steam cleaners, which can force moisture deeper into foam.
  • Avoid soaking the topper in a tub, shower, or large basin.

Sticking with gentle, diluted solutions and light applications is usually best.

How can I prevent future urine accidents from ruining my topper?

Prevention makes cleanup much easier.

Common protective steps include:

  • A removable, washable cover for the topper
  • A water-resistant or waterproof protector over the mattress and topper
  • Checking the topper regularly so small accidents don’t become long-term stains

These layers act as a barrier, so urine sits on the cover instead of soaking directly into the memory foam.

✅ Quick Mattress Takeaways

Key points about how to clean a memory foam mattress topper with urine

  • Blot first: Remove as much liquid as possible before cleaning.
  • Spot clean only: Avoid machine washing or soaking memory foam toppers.
  • Use gentle solutions: Light sprays of diluted cleaner, then blot; don’t drench the foam.
  • Deodorize with baking soda: Let it sit, then vacuum to help reduce lingering odor.
  • Dry completely: Air dry flat with good airflow; avoid high heat.
  • Repeat lightly if needed: Multiple gentle treatments are safer than one heavy one.
  • Protect for the future: Covers and protectors can help prevent deep stains and odors.

With patient, gentle cleaning and thorough drying, many people are able to significantly reduce both stains and smells from urine accidents on a memory foam mattress topper.