I just tried dehydrating strawberries in our oven (it has a dehydrator setting), and used parchment paper to line the metal trays. The results were quite good, but the parchment absorbed a lot of juice and I'm wondering if wax paper would be better? Or would that just leave wax on the fruit?
Instead of parchment or wax paper, why not aluminum foil? If you use the slider type of foil (where one side is non-stick and food slides off easily), any juice released when dehydrated will also dry under the strawberries and stick to the dried berries, not the foil. I use it when dehydrating herbs in my oven. (I put a 100 watt incandescent bulb in the bulb socket and leave the light on. The temperature stays just under 120° F or about 50° C.)