I have been having problems with my Epson 1280/continuous ink system/Magic Mix Inks. All the colors work great except the Yellow. I have tried the standard cleanings and installed the old epson cartridge which works fine after a cleaning. When I reinstall the bulk ink system it works for 2 or 3 prints and starts to fade again. I am in the process of using cleaning fluid but can't tell if its the head clogging or if the yellow system is getting air in it. Any suggestion would help Thanks