How to Remove Cat Urine from a Memory Foam Mattress illustration
Image: AI-generated by Stain Rescue Daily

Pet Stains & Odors

How to Remove Cat Urine from a Memory Foam Mattress

Cat urine on a memory foam mattress can leave a stubborn stain and odor, but you can tackle it with an enzymatic cleaner and gentle blotting. Here's a practical guide for fresh and dried accidents, with memory foam-specific precautions.

Published August 19, 2026 Updated August 20, 2026 4 min read
Part 2: Safer action steps
  1. Blot up as much urine as possible. Use a clean, dry cloth or paper towel to gently blot the area. Press down firmly to absorb the liquid, but avoid rubbing, which can push the urine deeper into the foam.
  2. Apply the enzymatic cleaner. Saturate the stained area with the enzymatic cleaner. Make sure it penetrates the foam. Enzymatic cleaners break down the proteins in urine, eliminating both stain and odor.
  3. Let it sit. Allow the cleaner to sit for the time specified on the product label—usually 10 to 15 minutes. This gives the enzymes time to work.
  4. Blot again. After the dwell time, blot the area with a clean, dry cloth to lift the cleaner and dissolved urine. Repeat this step if the stain is still visible.
  5. Rinse with cold water. Dampen a clean cloth with cold water and gently blot the area to remove any remaining cleaner residue. Blot dry with another cloth.
  6. Deodorize with baking soda (optional). If any odor remains, sprinkle a thin layer of baking soda over the area and let it sit for several hours or overnight. Vacuum it up the next day.
  7. Air dry completely. Let the mattress air dry fully before putting sheets back on. You can speed up drying with a fan or by opening a window, but avoid using heat, which can set the stain.

What Not to Do

  • Don't use steam cleaners or hot water. Heat can set the protein in urine, making the stain and odor permanent.
  • Avoid harsh chemicals like bleach or ammonia. These can damage the foam and may react with urine to create harmful fumes.
  • Don't rub the stain. Rubbing can push the urine deeper into the foam and damage the material.
  • Skip the regular carpet cleaner. Many carpet cleaners are not safe for memory foam and can leave residue that attracts dirt.

Fresh vs. Dried Stains

Fresh urine is much easier to remove because it hasn't had time to soak deep into the foam. Blot immediately and use the enzymatic cleaner right away. For dried urine, you may need to apply the cleaner more generously and let it sit longer. You might also need to repeat the process a few times to fully eliminate the odor.

Memory Foam-Specific Warnings

Memory foam is sensitive to moisture. Over-saturating the mattress can lead to mold or mildew growth. Use just enough cleaner and water to treat the stain, and make sure the area dries completely. If you live in a humid climate, consider using a dehumidifier to speed up drying.