I'm getting back into packing now that my son is old enough and showing some interest. I really haven't done any real trips since Boyscouts. My dad was active in the troop. Anyway... He gave me his old external frame Jansport. It's very comfortable and I plan to use it for a while. The only problem is that he put it in an oversized garbage bag and sealed it up for a couple years. It has a "sour" smell to it that gets worse with humidity. I don't want my gear (or myself) to smell like this. How can I get that smell out? Could I take it off the frame and wash it in the machine on delicate? What else can I do?