I saw a hidden camera report on a news magazine show (Dateline, 20/20 or similar). It showed how housekeeping REALLY cleans your room. The hotels ranged from family-type properties to top of the line, 5-star hotels; the best of the best. In every case, it was shocking. Not once was a glass actually replaced or rarely even washed. Just wiped clean with the same rag they had used to dust the furniture and, seriously, clean the toilet. They pop a paper cover on it and that's it. It changed my whole way of thinking whenever I go to grab a glass in a hotel now.