Recently, I needed not only to clean but also to disinfect my mattress in order to kill all even micro parasites, and I decided to look for solutions to this issue. It's good that it occurred to me to look for ways to steam clean the mattress and I came across a good article https://www.fortador-usa.com/blog/how-to-steam-clean-a-mattress-to-remove-urine-sweat-stains-dust-mites and here the experts gave very good advice. All I needed was baking soda, a steam cleaner, vinegar and a vacuum cleaner. First, he sprinkled the mattress with soda, then treated the dirtiest places with vinegar a little, vacuumed it and went through a steam cleaner with a special nozzle. Now the mattress is not only clean but also sanitized like in a hospital)