Digital BW, The Print

Hi.  This is my first post.

I have an Epson 1520 printer.  I originally purchased it for use with 
the Peizography inks.  The inks promptly blocked up the ink jet 
nozzles.  I've now switched to the MIS inks but I have not been able 
to unblock all the nozzles. I've run multiple cleaning cycles (as 
suggested in the Epson manual) but to no avail.  Does anyone have any 
suggestions.

Many thanks for your help.

Best,

Richard Greenstone