Dehydrating Bananas

I'm having just a little bit of trouble dehydrating bananas. I bought a can of Planters nuts mix. It also had dried banana chips that were so good. So ... I ran to the store for some banana poundage. Did a google search on just how to get started. Seemed pretty simple, but two trys later, I still have no bananas dehydrated. The first batch got burned to an untasty mess. The second batch wasn't completely dried. Maybe the third time will do. I'm going to the store later. I think I'll try again.