My Epson 3880 is about two years old. This year, twice now, it appeared that the Photo Black ink was totally clogged. The remaining ink indicator showed about 50% remaining. Both times, after running several cleaning cycles to no avail, I removed the cartridge and saw it was empty.
FWIW, to avoid reporting errors of this sort, Epson recommends changing ink carts with the printer powered on, which is what I always do.
Anyone have a similar experience?