Digital BW, The Print

Over several years I've found Epson OEM carts for 2200 don't have any
storage evaporation issues at all, or any issues just sitting in the
printer, on or off for weeks at a time...at 1 mile altitude and very
low humidity. 

NOW I'm starting to enjoy MIS UT7. This is obviously a different type
of cart, with sponges and an additional vent at the top. 

? WHAT should I do with the MIS carts when not printing...seal in a
ziploc with a damp sponge, for example? They look more vulnurable to
evaporation and clogging than the higher-tech Epson carts.

ADDENDUM: I've just finished some Black Only prints on Costco Kirkland
and there is ZERO bronzing at any angle in many different lights, and
no  gloss differential. Absolutely perfect from 2200, very first
print. The particular image suffered from microbanding with QTR and
Epson pigs on Kirkland and that's still there faintly when inspected
at a nearly flat angle, but much less with Black Only/Kirkland in
deepest black(maybe 75 degrees from dead on).

Mext I'll test this image with QTR and MIS. This is from a 130MB scan
from 6X7...it's grainless with QTR but of course "grainy" in close
inspection in Black Only at 7X9" (cropped at one end).