Arrange peach slices on dehydrator trays, not touching each other.
Dehydrate at 135-140 degrees for 4 hours.
Flip peach halves over, and continue dehydrating about 4 more hours - until peaches are soft, dry, and leathery.
If peaches are still tacky to the touch, they need to go a bit longer.
Let cool completely, before storing in a tightly-sealed container.