If you need to expand your dehydrator's capacity, you can purchase 2-pack additional trays. With additional trays, you can take advantage of food savings during harvest time or dry your own garden fruits and vegetables as they ripen. No tray rotation needed. The heated air flows horizontally across each tray providing fast, even drying for best nutrition. Trays are easy to clean. Just wash in warm, soapy water or in the dishwasher on the top rack-however, trays must be removed before drying cycle. The opaque vita-save® exterior blocks sunlight to reduce loss of minerals and vitamins.