How do you clean chocolate milk from a mattress?

To clean chocolate milk from a mattress, start by blotting the stain with a clean cloth to absorb as much liquid as possible. Mix a solution of mild dish soap and water, then gently dab the stained area with a cloth soaked in the solution. Rinse the area with a cloth dampened in plain water to remove soap residue, and finally, allow the mattress to air dry completely. If needed, sprinkle baking soda over the area to help eliminate any lingering odors.