Everytime I need to DFU Restore my device - I simply plug my powered-on device into my iTunes and hold the power-and-home button until the screen shuts down - and I then keep holding the home button until I hear the device beep on my computer. However - now I read - that I need to "power-off" the phone first and the do the routine... So all this time I have been doing DFU while my device was powered-on... Does this matter in any way? Or am I being OCD about this?