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Wash blueberries thoroughly under running water
Place a clean kitchen towel or paper towel on the counter and pour the blueberries on it. Take another towel and lay on top. Then gently move in a circular motion to dry the blueberries. You can also use a salad spinner to dry the berries as another option.
Spread blueberries out on a dehydrator tray so they're not to close and crowded.
Dehydrate at 135º F for 16 hours.
Keep in mind that the bigger your blueberries, the longer it will take to dehydrate.