Blot the stain immediately with a clean white cloth or paper towel
Use cold water only
Mix a small amount of mild laundry detergent with cold water
Dab the stain with the solution using a clean cloth
Blot again with a dry cloth to lift moisture
Apply a paste of baking soda and cold water if the stain remains
Let the paste sit for 15 to 30 minutes
Wipe away the paste with a damp cloth
Repeat as needed until the stain fades
Use 3% hydrogen peroxide on a hidden spot first to test for discoloration
If safe, dab hydrogen peroxide onto the stain
Blot with a clean cloth as the stain lifts
Sprinkle baking soda over the area to help absorb moisture and odor
Let the mattress air-dry completely
Use a fan or open window to speed drying
Avoid hot water
Avoid rubbing the stain
Avoid soaking the mattress