I'm going to email over a nozzle check to Sean after i've cleaned it a bit more. He said a head wash might help and will talk me through it. He said he sees problems with black a lot, as it doesn't get used much. i have black in a lot of my designs but I guess it uses a mix of colours and not pure black. He mentioned the range of ink that he sells and that it includes a warranty on the machine if i change to their ink, which seems too good to be true.