To eliminate odors, mold and mildew from tents and other gear without damaging the waterproof coatings or fabrics, use MiraZyme™ enzyme-based odor eliminator:
Fill a tub with just enough cool water to submerge item. For tents and packs add 1-2 oz of Mirazyme (depending on odor strength). Stir to mix.
Unzip all zippers, open flaps, etc. Submerge item in solution saturating inside and out. Soak for 5 minutes then remove. Do not rinse, the enzymes do much of their work while the item dries. Hang to air dry in the shade. Do not machine dry.