Still need help. I have been able to get each refillable cart to work, after much gnashing of teeth and pulling hair. I follow the instructions to the letter -- fill cart, remove orange plug, inset syringe in exit nozzle and prime the cart. Each time - no matter what color, magenta, black and now cyan - it takes many, many cleanings, power in pairs usually, before the nozzle check indicates that everything is all flowing. Right now, I had just inserted the cyan refillable cart, and the nozzle check shows that there is very little coming out from that channel, even though looking at the tubes the ink is there, and looking at the cart, all seems fine. I know I can get it to work, but what I don't understand is what am I doing wrong that it takes so long for these carts to work as they should?