How is it set up? Dual cmyk, 6 color? What order are the cartridges in?
Mine is set up in such a way that there is no way cross contamination can occur. 4 heads, each head handles it's own color.
If I'm not mistaken this printer can be set up 2 different ways using 4 color.
B,Y,C,M,M,C,Y,B
or...