As per our instructions, it is important to regularly check the cartridge ink levels regularly to avoid running a cartridge empty, as the chips automatically reset so the printer always shows the carts as full.
The exit chamber of all refill carts must be at least 1/2 filled with ink for proper function and flow, so if a cartridge is run empty and the exit chamber is empty or less than 1/2 full, the cartridge will need to be re-primed in order to draw ink into this area after refilling the cartridge with ink, before reinstalling the cartridge into your printer.
If a cartridge is allowed to run empty, then air is drawn into the printer's internal ink line. To remedy this, refill the carts with ink and do 2-3 Power Clean Cycles thru the control panel to purge air and refill the internal ink lines. Print a nozzle check to make sure all positions are fully printing before printing images.
Best regards~ Dana