Good service often goes unnoticed

I am sitting in BWI waiting for the last plane to Portland, and I am watching a man clean the terminal area. He may not be an Einstein, but he clearly cares about the appearance of this terminal and literally gets down on hands and knees to pick up scraps left by careless travelers. I have not seen this attention to detail outside of Disney World. I had to personally thank him for the good job he is doing, and I believe from his reaction that he doesn't hear that very often. If you read this and encounter a person doing a thankless job, thank them.