Remove the cartridge and seal the inlet & outlet with sticky tape, put a short length of plastic tube onto the hollow needle which takes the ink to the printhead, use a syringe to fill the tube with JR or JET TEC Cartridge Flush and leave to soak for a few hours. Then use the syringe again to suck out the fluid, replace the cartridge after removing the tapes, run head clean or better still a small test document in WORD using large font in yellow only.
David
August 2006