A reader writes:
"If I dehydrate onions and garlic, will the odor affect other foods dehydrated in the future?"
Your dehydrator will not retain strong odors. However, we do recommend that you dry pungent foods separately from other foods. If you are using a Living Foods Dehydrator, put foods with stronger odors on the upper trays. Since there is no fan that circulates the air throughout the dryer, the heat convection will take odors out of the dehydrator with minimal mixing of flavors.
Remember to wash your trays well especially after drying garlic. The oil in garlic washes off easily with soap and water but might flavor other foods if not removed.