Check into steam cleaning a mattress.
Here's a useful article Linda
Hi Linda - 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
This video tutorial should help: https://www.youtube.com/watch?v=dDBIrXmkAGk