Howdy, Eco-earth should not need to be baked right out of the package. However, if you are trying to recycle it, I would bake it in an oven pre-heated to 250 degrees F for 1/2 hour. Spread it out on a cookie sheet no more than 2 inches deep and distribute it evenly. The eco-earth should also be uniformly dry in advance, with no wet clumps. Once baked evenly at the temperature recommended (and pre-heated is important or it might not be sufficient) then that should kill all molds, fungi and bacteria. Then it should be ready for a reincarnation. After two bakings, I would discard it before it turns to powder.