Digital BW, The Print

Hi, 
Hoping the sage wisdom of the 2200 users in this group can help...

I have a new problem on a several year old Epson 2200. A while back I 
was using MIS UT7 inks and I suddenly developed some banding that 
wouldn't clear using the tips in the knowledge base. Ultimately I 
deciced to switch back to Epson UC inks and after a few 
cleanings/purge prints things were fine. 

I use the printer every so often but certainly not every day. I last 
used it a week ago and it was fine. I went away for nearly a week 
(and while I was gone the temp soared to 100 degrees) and when I went 
to print I had horrific banding and it looks like Cyan has stopped 
printing entirely. I had some other carts that were running out of 
ink so I replaced those (with Epson UC). At this point, Cyan and Lt 
Cyan do not appear to print at all...Lt Black barely does. All others 
band as well. 

I've tried all the clean/clean/clean print clean/clean/clean tips. Is 
my only recourse at this point to use the cleaning fluid on the dump 
sponge?

thanks

Jerry