I have always used Canon and compatible inks but everything, at the moment, is only printing in pink! I have tried purchasing from various suppliers and all the cartridges behaving in the same way. I've done all the nozzle checks, pricking the air holes, touching ink outlet with a damp cloth and to no avail. Have already returned one of this model as I was having the same issues so this printer is actually only a few weeks old. Any ideas????