Blot the urine with paper towels or a clean cloth
Remove bedding and wash it separately
Mix equal parts white vinegar and water in a spray bottle
Lightly spray the stained area
Blot again with a clean cloth
Sprinkle baking soda over the area
Let it sit until completely dry
Vacuum up the baking soda
If needed, apply an enzyme cleaner to the stain
Follow the product instructions
Let the mattress air dry fully
Use a fan or open windows to speed drying
Repeat if the stain or odor remains