Hand wash or machine wash separately in cool to warm water, using a mild detergent (free from any bleach). Make sure your mattress protector is unzipped with waterproof backing facing in.
Please do not use any solvents or bleach, bleach alternatives, non-chlorine bleach or any bleach by-products in the detergent, as this will damage the waterproof backing. Avoid using harsh chemical as it reduces the absorbency of the material.
Tumble dry on a low heat with bed sheets or other clothing or air dry. Do not iron. Do not dry clean.