I have some banana chips that get given to the chickens as a treat every now and again ... bleech ... LOL Let me just say that the lemon juice "trick" to keep them from browning ... well, it makes them pretty inedible too!
I too have tried the dreaded banana dehydration.
I don't want to give the wrong impression here, dehydrating food is a wonderful thing, im just not a fan of dehydrated fruit.