I'm referencing an article I read several years ago, so I admit this practice has probably changed, especially in the major chains and boutique hotels.All the hotels that I stay at actually do change the duvet covers and bedspreads between guests. Many major chains do so. So the term "most" is probably an exaggeration. But yes, there are many hotels, specially low end ones, that do as little as they can get away with.Yup, and most hotels only wash their bedspreads once per month.Well that was a horrifying fact to learn.