Okay, it is summer and extremely HOT here (high 90's). So when I am out and about I am often a bit sweaty. If I talk on the phone with it up to my face, of course the screen gets a little wet, but then the screen gets immediately unresponsive. I often have to hit the power button to turn the screen off, wipe the screen, then turn the screen back on to get it to respond. I can usually hang up the phone okay but can't get back to a different screen or push any other areas of the screen. Is this normal? A couple of times I have actually had the phone completely freeze on me and had to do a battery pull.