So these ink cartridges with built-in pressure nozzles may not be so very suitable for mehrmaliegen reuse - but I have also experienced some with original cartridges from Lexmark. Some ran for a while refilling another strike even with about half filled, despite the use of ultrasonic cleaning and special cleaning fluids for the heads. Why should the "professional" replenishers go bwesser there. Maybe my Lexmark device, an X74 scan printers combination unit of the automatic maintenance settings (In between cleaning operation and wipe the print heads) was not suitable. I have now discarded as a printer and benütze it only as a scanner. With my two new (Canon) devices with fixed print head and five ink reservoirs now I've been driving for over a year much better and without printhead failures. Well, once I have the warning to the red color by 5s-keystroke "skipped" and refilled a little too late. The Lies to fix a "cleaning service" back through there. This has rarely been so easily folded at present cartridges. In short, whether the cartridges the cause of my "average discord" were or my old printer, I am glad to have him retired and bought a printer with ink reservoir without printheads. Well, eventually falling to the non-replaceable print head, then probably all it's over - but the ink refills are here but easier and cheaper, a printhead but ultimately high technology and entprechend expensive - and as disposable items? As much as the concept, the actual Kerntechnologie- and consumable printer nozzle together always share the same with the Printer spoke for an "eternal" life of the printer, it was too expensive with Oritinalpatronen and the life extension of the cartridges by refilling flap neither with me nor with the replacement cartridges external Patronennachfüller satisfactory!