1 Container with an airtight lid 4 sponges cut in half (from $1 store) 1 cup of your favorite fabric softener 2 cups water WHAT TO DO: Mix the water and fabric softener in plastic container. Add the cut sponges so they can soak in the mixture. When ready to use, squeeze the excess liquid from 1 sponge and place into the dryer with your wet clothes. Run the dryer cycle as normal. Once complete place the now dry sponge back into the container of liquid for use next time.
My mattress had several stains, I'm sure they were a combination of drool, urine, beverages, baby spit up- you name it. Anyhow, this method really worked well. I had one pretty dark stain that I sprayed again later with a new mixture. I am amazed..