How to remove urine from a memory foam mattress

Updated February 21, 2017

The soft, supportive surface of memory foam makes it a popular material for mattresses. Memory foam is thick, dense foam that forms to the body, alleviating pressure points and discomfort during sleep. Incontinence during sleep is a problem for many people, and accidents occasionally happen. Cleaning urine from a memory foam mattress is essential in case of a late-night accident.

Blot the urine from the mattress as soon as possible. Fold a clean towel in half and press it firmly over the stain, applying as much pressure as necessary to draw the liquid from the foam. Memory foam is extremely thick, so you may have to press down hard to pull out the urine.

Pour 1 cup of cool water over the stain to rinse away residual urine. Blot the water out with clean towels until no more liquid can be pulled from the mattress.

Add 1/4 cup of baking soda to a small bowl, and pour in 1 cup of hydrogen peroxide. Stir with a small spoon to form a thin paste. Hydrogen peroxide helps to break up the proteins in the urine, while baking soda helps to whiten the stain and remove odour from the mattress.

Dip the end of a sponge in the peroxide paste and scrub the urine stain, pushing down gently to work the mixture into the fibres of the foam. Allow the paste to sit on the memory foam for five minutes, then rinse with clean water.

Reapply the hydrogen peroxide paste until no traces of urine remain. Blot up excess moisture between applications, and allow the mattress to air dry overnight before use.


Hydrogen peroxide is a bleaching agent, so test the mixture on a small, hidden area of the mattress before use if you are worried about discolouration.

Things You'll Need

  • Towels
  • Water
  • Measuring cups
  • Baking soda
  • Hydrogen peroxide
  • Small bowl
  • Spoon
  • Sponge
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About the Author

Louise Lawson has been a published author and editor for more than 10 years. Lawson specializes in pet and food-related articles, utilizing her 15 years as a sous chef and as a dog breeder, handler and trainer to produce pieces for online and print publications.