I just got a Nesco American Harvest Dehydrator. Can’t afford Excalibur and wasn’t sure how much I would use one so didn’t want to invest a lot right away. Anyway, in reading the booklet that came with it, it says vegetables must be steam blanched before dehydrating. Is this really necessary? It seems to defeat the purpose and wouldn’t steaming be too high a temperature to expose something to if you want to keep it raw. I made eggplant pizza and sweet potato chips and they came out fine. I didn’t do any blanching. The sweet potato chips didn’t seem quite as crispy as I would like but maybe Ineeded to keep them in longer.