Moisture can cause mold to grow in a tent while it's packed away.
To absorb this moisture, make a kitty litter sachet to place in the tent. An inexpensive clay mask can be made out of cat litter. Mix three tablespoons of cat litter with about three tablespoons of water, then mix with a pestle. It's perfect for detoxifying the skin. Deodorize stinky shoes by placing a cup or two of cat litter in knee-high pantyhose, tie a knot and leave it in the shoe overnight.