Just want to double check you’re following the right instructions:
# Connect the device to a computer using a USB cable.
# Hold down both the Home button and Lock button.
# After 8 seconds, release the Lock button while continuing to hold down the Home button.
** If the Apple logo appears, the Lock button was held down for too long.
# Nothing will be displayed on the screen when the device is in DFU mode. If open, iTunes will alert you that a device was detected in recovery mode.
** If your device shows a screen telling you to connect the device to iTunes, retry these steps.