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 10 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.