After pretreating, the apple slices may be sprinkled with cinnamon or flavored gelatin crystals. Be sure to cover fruit with screen or cheese cloth to keep away insects. Bring in or cover at night to keep moisture from collecting. This is generally the fastest method. The temperature should be 150 degrees for 2-3 hours, then reduce to 130 degrees until dry.
Fruit is dry when it is soft and pliable with no moist area in the center when cut.
To insure that sufficient moisture has been removed to prevent molding during storage, place the fruit in an air tight container for several days. Check daily for condensation on sides of container. If condensation appears, dry the fruit a little longer. But for best quality and nutrient content, plan to use within one year. Various fruit juices, cordials and fruit liquors may be used.