If clothes touch skin directly then they are put in the wash every day (socks, underwear {boxers}, tee shirt, shirts etc...) other wise it is a check to see.id still.good for follo days - did jeans get muddy / dirty, did I spill coffee on trousers etc... jeans go in wash after a week of wearing even if no spills / mud
Greg Bear - EON but more maths heavy, and has a bit of politics but a very good read
Larry Niven - Ring world series (maybe not competence focused, but strong science backing)
If clothes touch skin directly then they are put in the wash every day (socks, underwear {boxers}, tee shirt, shirts etc...) other wise it is a check to see.id still.good for follo days - did jeans get muddy / dirty, did I spill coffee on trousers etc... jeans go in wash after a week of wearing even if no spills / mud