Digital BW, The Print

I just had a nasty, nasty clog in my K channel.  I tried just about 
everything, including under head cleaning, running window cleaner with 
ammonia through that channel...  Finally, and right before I was about 
to throw the whole kit and kaboodle in the trash, I contacted Ink 
Republic, the makers of my CIS.  They sent me their UFO cleaning kit, 
which consists of two special cartridges, two syringes and some cleaning 
fluid.  I installed the special cartridge in the clogged channel, which 
allowed me to use a syringe to inject cleaning fluid right into the 
head.  I followed the instructions at Inkrepublic.com.  It worked very well.