I don't think they really care
Service and value mean a lot to me and cleanliness is where I draw the line. I know things can go wrong, I also know things can be fixed. When I let the staff know about issues in my room and leave for the rest of the day I expect them to be fixed when I return. I also expected they would care when I told them they were not. So much for my expectations. Maybe I'm just spoiled by hotels that care.