To dehydrate nuts in a food dehydrator, start by selecting the nuts you want to dehydrate and rinsing them under cold water to remove any dirt or debris. You can choose from a variety of nuts such as almonds, cashews, walnuts, or pecans.Next, spread the nuts out on the dehydrator trays in a single layer, making sure they are not overlapping. This will allow for even airflow and consistent drying.