Digital BW, The Print

Paul, I noticed what appears to be some magenta pigment settling out 
in the yellow chamber of my 1280 color cartridge.  Is magenta pigment 
used in the UT2 yellow position?  Not wanting to wait for a mail order 
to to arrive, I guess I'll need to flush out that position before I 
refill it.  I'll use windex followed by distilled water followed by 
some "vacumn sucks" to dry it out.

Do you how long UT2's self life is or how long before it the pigments 
start to settle?  I make it a point to shake the bottles every now and 
then, but not the carts as I'm afraid of getting air in the chambers.  
Any thoughts about this?