For some reason today, my Apple Wireless Keyboard doesn't seem to be holding a persistent BT connection to the iPad. Turned both devices on and off, changed the batteries in the keyboard (though they measured fine on a battery tester), nothing else is using BT nearby--nothing seems to be helping it. It simply periodically drops after a variable amount of time of non use, even as little as a minute. I'd think that was normal, save that it never used to do this. Prior to today, it would sleep after a much lengthier time, perhaps half an hour? Any ideas? I'm about to "forget" and re-pair them next.