Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to clean your iphone or ipod touch screen [title] Unplug the iphone or ipod touch and shut it down. [step] If you attempt to clean the screen of the device while it is still turned on, you risk permanently damaging it. [substeps] Refer to the instruction manual that came with your device if you have trouble turning it off.

Ending1: [title] Unhook the device from the charger. [step] Unplug the battery from the charger. Ending2: [title] Wipe off fingerprints with a microfiber cloth. [step] Your device may have come with a small, soft cloth that is made to be lint-free. Ending3: [title] Remove either the back or front of the device. [step] If you are using a remote without buttons, you should remove the entire screen and wiring section before attempting to clean the device. Ending4: [title] Take off the usb cable from the device. [step] Take the usb cable from the device on which it came.

Answer format: ending1/ending2/ending3/ending4