How to Clean Old Blood Stains on a Mattress (The Enzyme Method)
To remove an old blood stain from a mattress, apply a thick paste of unseasoned meat tenderizer and cold water, leave it for 45–60 minutes, scrape it away, and blot out the residue with a cold, damp white cloth. Keep the mattress as dry as possible, and never use hot water or steam. Dried blood…










