Just applied my invisibleSHIELD screen and back protector. Front went on fine, back was a little tricky... Anyways, after installing, I decided to turn the touch on to check my email and the power/lock button is acting weird. When I press it, it doesn't do anything. It worked before for a minute but now it's doing it again. Also, sometimes is is very sensitive. I barely have to touch it to turn the device on and off. Another thing, the "Slide to power off" screen keeps popping off randomly. Not sure if this means my button is jammed/not working or what, but I have never seen this screen before. I'm wondering if some of the solution used to apply the back protector did something to the switch. Hopefully you guys can help me out. I just got this iPod this Saturday(used) and it has been working great until now.