Even if it isn't the case in "Encounter at Farpoint" where Weasley is still wet (and stays it) after leaving the Holodeck, water should normally disappear after exiting it, as all the other things (or persons) that leave the holodeck. So what would happen if you wash yourself in the holodeck? You would go out and the water would disappear. But what would happen with the dirt? Normally "real" things stay even if you change the setting of the holodeck program. But is dirt also concerned by this? So could I enter the holodeck, wash me there, and come then out, dry and clean? What do you think about this idea?