How do I clean urine from mattress?

Years ago our cat peed on our mattress. We were young and just starting out so we didn’t have the $ to replace it. Thankfully a friend of the family was a carpet guy. He brought his huge machine up into our little apartment and cleaned it for us. I couldn’t believe what a great job he did. After he was done you couldn’t even smell cat urine. We then bought a waterproof mattress cover.

An ex housemate took his wet mattress off his bed & propped it up against the gas heater to dry. Where it did dry but also caught fire.

Don't do that.

I offered our small city flat for my daughter’s visiting relation-in-law. He turned out to be urinary incontinent, with absolutely no idea or concern about dealing with it. My poor shocked daughter had to buy a new mattress and get the bedroom carpet cleaned when he left (and he paid!). I’ve now put a very good mattress protector on that bed, ready in case a loan ever goes bad again, and I’m planning to put protectors on all beds. It’s not that cheap to do several beds, but it’s a lot cheaper than replacing mattresses.

I know someone who has a son that is a bed wetter. He has severe autism.

She places towels to absorb the urine.

She places vinegar diluted with a bit of water in a spray bottle and sprays liberally onto mattress. She lets that sit for quite awhile, then sprinkles baking soda to deodorize.

You can vacuum up the baking soda before placing bedding back onto the mattress.

I remember when my kids were young and sometimes had accidents in bed. I took the sheets off the bed to expose the mattress and poured rubbing alcohol all over the soiled spot and air dried it out all day. I opened the windows and door to ventilate the room.

That did the trick because by night time the mattress was dry and didn't smell. Of course, I didn't put my nose next to the spot and took a sniff test, but I didn't detect any urine smell being in the room or laying on the bed.

Can you send it out to be cleaned and sanitized?
Or, if possible, can a carpet and upholstery cleaner that uses deep hot steam come to the house?

Grasping at straws here. Skip the home 'Little green cleaning machine"....
it has no suction to extract anything from our carpet!

Hydrogen peroxide. It is an oxidizer and it will remove the stain and the odor.

Too bad its not summer and you can put out in the Sun after washing. I agree about neutralizer but read the label. The one I used was not guaranteed to work if a cleaner had been used before. The problem with urine is it soaks to the padding underneath so soak and let sit. There are mattress bags that are water proof. The whole mattress goes in the bag and you zipper it up.

Try google, I've done a search and there are several options. I personally would treat it with a pet urine neutralizer like nature's miracle and suck the solution up with a shop vac or a steam vac with an upholstery attachment. Then get yourself a moisture proof mattress cover and several washable bed pads so it doesn't happen again.