Digital BW, The Print

I have had my 1280 for 2 years and have been very happy with its B&W 
and color prints.  However, recently I have had serious banding 
problems.  I have realigned the heads (without any effect).  Nozzle 
checks do Not ensure a print without bands. Basically I have to 
clean the heads 3 or 4 times before printing and then maybe I can 
get through an entire print without the banding return.  I have 
replaced the ink carts - no difference.

Does anyone have any experience with this?  Will using cleaning 
cartridges from MIS fix this problem?