Digital BW, The Print

I have been using UT2 inks in an Epson 1280 with the usual slight clogging problems that 
could be easily resolved with the normal cleaning utility. After not using the printer for 
three weeks, I have encountered a clog in the black ink head that won't go away. About 
50% of the head showed clogging and misalignment and after 2 days of using advanced 
cleaning techniques (lint free wipes impregnated with windex, syringing diluted windex 
through the print head) recommended here and on other web sites, the head has been 
improved about 95%. When I run a nozzle check there is still one line that is jagged and 
misaligned, the result being tiny white spots on the print. Running the alignment utility 
didn't help.

Questions: Is there any other method for cleaning this problem? If removing the head is 
necessary where might I find instructions? 

I hate to write this printer off as I fianlly have the printer and ink set dialed in and the 
results generated by it with the UT2 inks are spectacular.  Thanks.