Kids' items need frequent cleaning for health and hygiene. Here's the safe and effective way to clean crib mattress.
Strip the crib of sheets, mattress protectors, and any covers. Wash bedding in hot water.
Vacuum the entire mattress including sides and bottom with the upholstery attachment to remove dust and debris.
Mix a few drops of mild dish soap with warm water. Gently dab stains with a damp cloth -- never soak the mattress.
Sprinkle baking soda over the mattress and let sit for 1-2 hours to absorb odors and any remaining moisture.
Vacuum up all baking soda. Stand the mattress upright to air dry completely before putting it back in the crib and adding fresh bedding.