Tipping housekeeping staff is not something new. It's old, established practice and I always do it. I've worked hotel housekeeping. It's a hard job and can often run to upwards of ten hours if people don't check out on time or the place is full or short staffed. Pay is minimal and often by the room. I love coming back to my room to find it tidy and clean, fresh towels waiting for me and my bed made. I drink decaf coffee so I usually leave a note for housekeeping to leave extra decaf, and I appreciate that too. I leave a daily tip so that it's not just the last staff person of my stay to get a tip. I usually leave 4 or 5 dollars a day, depending on the quality of the place and the service.