Actually the cause of the clogging is more likely to be the ink (Cyan) but not the G&G cartridge. It is very simple, other colors worked fine. Same cartridges, aren't they? It has to be the 3rd party ink (Cyan) that has an incorrect viscosity and surface tension formulated in it. It is true that OEM cartridges are better built. But many, if not most, 3rd party compatible cartridges are decent and work fine. Ink is far more complex to formulate than making plastics. Choose ink from a trustworthy supplier. The root cause of your print head clogging is most likely caused by the poor quality of ink.