How do I clean the printheads on my HP Smart Tank 7600?

Printhead cleaning can be performed from the printer control panel, the embedded web server (EWS), or through the HP printer software on Windows. Navigate to the align or clean printheads option in the appropriate interface and follow the instructions. The manual cautions that after initial setup, you should not open the printhead cover unless specifically instructed to do so. (Page 82-83)