Or "hygiene" in the sense of avoiding actual, real life negative health outcomes?(http://www.autoadmit.com/thread.php?thread_id=5827960&forum_id=2most#49627738)
I also replace it (or wife does) Everytime laundry is commenced.
"all-in" that leads to it being changes, on a stage, around 1.3 times per week. (http://www.autoadmit.com/thread.php?thread_id=5827960&forum_id=2most#49627771)