I made dried apples with the white stackable nesco dehydrator. Absolutely delicious, soo much better than storebought.
Here is the link for the nesco dehydrator cookbook, with instructions:
http://www.nesco.com/files/pdf/dehydrat ... igest_.pdf
The key is follow the instructions. Timing and even slicing are key.
Also, pre-soak apple slices in a vitamin c solution to prevent them from turning brown. Buy ascorbic acid (vitamin c) powder at a health food store or online. Apples work best when you peel them as well. And buying an apple corer saves time. Obviously, best to start with fresh, in season apples. Green ones work the best for dehydrating.
The whole process takes a little while, but once you get into the swing of things, it goes quickly, and the results are well worth it.