Close the printer and unplug it from the power source. Open the printer cover to reveal the ink cartridge. Remove Pixma MP560 Cartridge - PGI-220BK and CLI-221. Carefully remove the components from the printer to avoid damage to the associated cables, with utmost care. Avoid excessive force when disconnecting cables. Clean the print head with ink cartridges this guide should help you clean them properly. Clean contact pad with a contact cleaner or a good old pencil rubber. Reinstall the print head before giving power to the Canon Inkjet Printer and then re-install the ink cartridge.More details: How Can I Get More Ink From My Canon Printer Cartridge?