How hot temp wise is "too hot"? Will it ruin my iPad over time? My 3 gets very hot. I have it in an Oberon leather bifold case, so when it is open/on screen, only the back of the device is covered. The front of the lower left of the screen gets very hot, as I type I can feel the heat under my fingers. So hot that there is no way I would ever let my 4yo son hold it. I know why this occurs, but isn't heat over time bad for electronics? I worry my 3 won't last. I have read heat is an issue on 3s, but not everybody experiences it. Should I take it back and try another 3? It is a 4g AT&T white 64gig, if that matters. I haven't activated the 4g yet, so just wifi stuff so far. It doesn't take long to really get warm, maybe 30 minutes then levels off to stay quite warm.