the first time i used it i put it in the oven on bake at 225 for a long while. but Lisa is right why dry it when its best attribute is holding moisture? just throw it in your cage moist. don't use too much water when you expand it and it won't be sopping wet. it will eventally dry out and if you are using an overhead lamp it will dry out a lot faster.
"a tolls a toll, and a rolls a roll, and if we don't get no tolls... then we don't eat no rolls "