How often do you find it necessary to clean your shirts? I'm fearful of any type of washing, so I am very careful about the conditions in which I wear my best clothing. Since I wear an undershirt and don't live in a smoggy city, I rarely wash my shirts. (Call me a "scrub," if you'd like, but I hate to picture what any of those machines are doing to my clothes.) Scrubb!!! Shirts should be washed after every wear! Maybe you can't smell your must, but others can! You are sitting around in a shirt for appr 10hrs every day. Wear>wash!