I have the Filson Apolis http://store.apolisglobal.com/event/store.item/itemGUID/e6f653ca-66e0-4a77-b1f0-edf4e348c6d1/ and I'm wondering what's the best way to clean the bag? Is there any way to retain the sturdiness? Mine's taken quite the abuse and would like to see if I can clean it up.



