i got a platypus hoser 60oz and a mil-spec "floation bladder/ collapsible canteen, 5QT " for a wile now, but i havent seen both of them totaly dry since the day i start using them even though i sometimes let it dry for a hole week. so any suggestion how to dry it ? because my way ( hanging it up-side-down with some air in it ) of drying doesnt work