Yeah, bananas are kind of tricky... My advice is to buy them GREEN, then slice them as thin as possible (I use a paring knife & try not to go cross-eyed). I put them on the dehydrator plain. About halfway through, I "unstick" them from the trays & turn them over.
For the kiwi, peel & slice a little thicker because they dehydrate down a LOT. I will forewarn you, the flavor is intensified when you dehydrate them, but I like it.
OK ... I'll give it a try ... (the kiwis) I dunno about the bananas. I'm kinda tired of fooling with them. Especially when I can catch them on sale and buy them already done up ... (Yeah, I'm lazy that way ... )
Go to Asian store. By plantains, not bananas. They should look like they are ready for the compost pile when they're ripe. (black) Tough skin, cut'em open, peel, slice, dehydrate. Easy, and tasty.
Ohhhh ... That sounds like it might work better ... I'll get some of them also. Thanks!!