Make even slices
Make sure to cut the slices as equal as possible. The freeze dryer cycle will take as long as the thickest part of the food. With watermelon, it wasn’t as important (because watermelon has a simple structure), but the freeze-drying process of other foods can be complicated by drying variable food thicknesses.
We decided to make sticks with our first watermelon test. We tried to cut them the same thickness as the original slices.