Digital BW, The Print

I am getting inconsistant nozzle checks on a 1280 epson.  I print one 
nozzle check, and I might have one small gap in the black position.  
I re-clean, then, a small gap in a grey section that printed 
perfectly on the previous nozzle check.  Very frustating.  If I 
*ever* get a perfect nozzle check, I can almost be sure that the next 
nozzle check or print job will have some screwed up nozzle positions.   
 
Very frustrating. 
 
I have had severe clogging problems the whole year and a half I have 
had this printer.  First with Piezo inks, then, with Paul's new UT 
inks.  I am at my wits end. 
 
I have tried: 
 
paper towel windex trick. 
removing cartridges and inject windex via syringe trick. 
coating rest pad with windex trick. 
clean a few times, let rest a while, try again trick. 
clean a few times, let sit overnight, try again trick. 
 
I have no more tricks left.  I am ready to chuck this thing in the 
dumpster.  I would pay for a new printer (again) to get a decent 
print, but I have no assurances that anything I buy will be any 
better than what I have. 
 
I am now at the point of trying any drastic measure, as a last 
restore.  I am willing to listen to anything.  Please post any 
suggestions that will help me before I lose any last little thread of 
sanity I have left. 
 
Thanks,