Digital BW, The Print

I have an Epson 2200 with MIS CFS and UT7 inks. I follow the suggested 
cleaning cylcle of 3 cleans and printing a Purge page, but I have 
horizontal lines that run across the Black ink and sometimes across the 
Lt Black, Cyan, Lt Cyan and Yellow. I have tried cleaning and lettin it 
set for several hours or a day, applying windex to the drain pad and 
letting it sit none of which has resolved the Black ink position.

I have read about dirty wiper blades, but don't know if this is the 
case. If so, how does one get to them and how are they cleaned?

Also if Foam or Air, how does that get resolved?

Thanks in advance,

Tony