Little accidents happen when you have children and pets. Urine is simple to clean up on hard surfaces, but your memory foam mattress will quickly absorb the liquid. Fast action in response to the accident is the best way to remove it. In addition to cleaning the urine off the surface of your memory foam mattress you must also draw it out. Home remedies effectively remove urine and its accompanying odour.
Place a thick layer of paper towels over the site of the urine on your memory foam mattress. Press the paper towels into the mattress to wick out all moisture. As the towels become soiled throw them away and replace with fresh paper towels; continue this process until you're no longer able to wick out any urine.
Cover the site of the urine stain with an enzymatic pet stain neutraliser. You can buy these from pet shops. Even if the urine stain wasn't caused by a pet the enzymes in the neutraliser will break down and remove odour-causing bacteria that creates a lingering odour. Allow the enzymatic cleaner to soak into the mattress for 30 minutes.
Pour 250 ml (1 cup) of undiluted white vinegar onto the mattress at the site of the urine stain. Allow the vinegar to soak into the mattress foam for a minute then begin to press paper towels into the mattress to wick out the vinegar. Repeatedly draw the vinegar and remaining urine out with paper towels until no more moisture transfers to the paper towels.
Stand the mattress up against a wall so air is circulates to both sides. If weather allows, prop the mattress up in front of an open window and rotate the mattress every few hours until it dries. Leave the mattress propped up until the foam is completely dry.
Sprinkle baking soda over the site of the stain until it's covered. Leave the baking soda on the surface overnight to deodorise any remaining urine smell. Vacuum the baking soda from the mattress.
Since liquid is quickly absorbed into a memory foam mattress, check both sides of the mattress to ensure the moisture has been completely wicked out.
Avoid using ammonia to clean up urine stains as this magnifies the smell to your pets and may attract them back to the spot for further urination.