FAQ THE MATTRESS PROTECTOR HOW OFTEN SHOULD I WASH IT? VOIR TOUTES LES QUESTIONS HOW OFTEN SHOULD I WASH IT? We recommend washing the mattress protector as needed, especially in the event of an accident or unwanted spill. In the instance of a mess-free bed, we still recommend washing the cover with every seasonal change. VOUS AIMEREZ AUSSI How do I care for my mattress protector?