just wondering if this has ever happened to anyone using the Epson Artisan 50 printer. One of the colors, I believe black, has a clog in it or something. When I print a calibration print, or whatever it is, I see that the black isn't printing at all. I tried using the clean nozzel head option, and still nothing. I purchased a "clog printer head" liquid and syringe but still has nothing. What other option is left?