I recently stayed at the Venetian in Las Vegas. On one of the sofas was a white stain of obviously human origin. We carry anti-bacterial wipes and Microban spray with us. So we cleaned the spot and washed up afterwards. Do you really think that the hard surface floors are cleaned any better than carpets? I suggest you look under the bed or between the bed and nightstands. I can assure you that the hard surface floors are just wiped occasionally. Really not any cleaner than the carpets.