To set the Auto-Cleaning on your PrismJET or ValueJET Printer: 

  1. Press [Menu]
  2. Press [Right Arrow]
  3. Press [Down]  until you come to Auto-cleaning and press [Enter]; the display will now show 'Waiting Time'.
  4. Press Enter
  5. Raise the # to the preferred number of minutes between cleanings (e.g. 1440 would mean that the printer will perform an auto cleaning every 1,440 minutes or 24 hrs.)
  6. Press  [Enter] and [Cancel]  until you come to 'Ready to Print'.