1. The surface of the printhead is very fragile, absolutely can not bump, must be protected. 2. When installing the printhead must be careful, be sure to power off, and put in place. 3. In order to avoid the damage of the print head due to improper installation, the printhead must be installed by professionals. 4. Should pay attention to the daily maintenance of the printhead (can use the cleaning liquid to clean the printhead, will not let the nozzle blockage)