I tried making fruit roll ups. I had to improvise instead of using a regular blender I had to use a smoothie maker - not sure if there's a technical difference between the two. Anyway, I pureed strawberries and pineapple and poured it into the dehydrator trays. Tastes great, but didn't come out in a leathery consistency - it's hard and breaks so I can't roll them. I'm going to assume that I dried them too long, unless someone chimes in on an alternate way to make fruit roll ups in the food dehydrator. I didn't treat them with anything, just used fresh fruit that I pureed.