What safety precautions should I follow when using the HP Envy 5640?

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