Today I did a nozzle check on my P400, which is using PiezoDN ink. It had been four weeks since my last nozzle check, and I fully expected the printer to need one or more head cleanings. After one head cleaning, all channels were perfect except for the Cyan channel, which was blank. I got ready to do a PiezoFlush cleaning. But when I pulled the Cyan cart, it was empty! And I mean bone dry. Four weeks ago, the printer ink levels utility showed it as half full. I think the cartridge must be leaking. Is that unusual?
Fortunately, I have a brand new Cyan cart, so I will fill it and replace the possibly-leaking (?) one.
Incidentally, Cyan has always been the most problematic (in terms of needing head cleanings, etc). Could there be something else going on there besides a problem with the cart that could cause this?