You can sprinkle with baking soda, let set, and then vacuum off
I agree with the baking soda. If you have spots, you can spritz with hydrogen peroxide. Then baking soda after it dries.
Steam cleaning is awesome if you have a steam cleaner but if not baking soda with essential oils mixed in and the vacuumed off after you leave to sit for a bit is good too.
Hello these collection of Hometalk links might be informative.
I hope it helps
How To Deep Clean a Mattress
How to Remove Pee Stains and Smell from Mattress
How to Clean a Mattress in 6 Easy Steps | Hometalk
Hi Jan: If you have pee stains from kids, this site from Hometalk should help: https://www.hometalk.com/8078385/how-to-remove-pee-stains-and-smell-from-a-mattress. For other stains, try this site: https://www.nectarsleep.com/posts/how-to-clean-a-mattress/
This article has some great tips
Hi Jan - This article is how to clean a mattress in 5 easy steps. Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean