What safety precautions should I follow when using the HP Envy 4520?

Always unplug the printer from wall outlets before cleaning, and never install or use the printer near water or when you are wet. Install the printer securely on a stable surface and in a protected location where no one can step on or trip over the power cord. There are no user-serviceable parts inside the printer, so refer any servicing to qualified service personnel, and only use the power cord and power adapter supplied by HP. (Page 2)