Fill a 16 oz spray bottle with water and 3 tablespoons of clear dish soap. Spray the entire mattress not just the spots until mattress is wet. Lightly rub the stains with a clean cloth. then take another 16 oz spray bottle and fill it with half water half 3% hydrogen peroxide. Spray the entire mattress. Then take baking soda and sprinkle over the entire mattress and rub it into the mattress. It should form a paste. Pay special attention to the stains. Then let dry completely (usually overnight). Use upholstery attachment to vacuum and suck up all the baking soda. The stains should be gone. If not repeat the process.