06-01-2009, 04:09 AM
I unclogged my RX220 by using Household Ammonia in a small shot syringe/needle (an eye dropper would work). I took out the cartridge and put 1 drop on the part that sticks up to pierce the cartridge. Put cart back in and run cleaning cycle 4 or 5 times and then put in another drop and repeat cleaning.
YMMV
Fred Also
YMMV
Fred Also