Dry in either a smoker, a dehydrator, or a low oven with the door slightly propped open with a wooden spoon or something similar. If using a smoker, follow the manufacturers directions. In a dehydrator process the jerky at about 150°F. Use only dehydrators with a fan and a thermostat. Dry until it is gets a flexible firm texture but before it cracks. The time needed varies widely depending on humidity, thickness, and your smoker or dehydrator. 4-8 hours is typical. Check it periodically.