• Correct, remove the lead and battery, then press the power button a few times to force the unit to dispense any remaining power.

    Leave it for more than a week if you can, as long as possible. Especially if you're going the "wash with water approach" (only advised for sugary liquids really, most people won't be able to open things up to clean things properly anyway).

    HD will be fine unless you're incredibly unlucky (short circuit from main board hitting the HD controller board or similar).

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