Once you do, use a dry part of the paper towel and blot it dry, do not scrub. You should start seeing the ink flow onto the paper towel. Next, twist the end of a paper towel and stick it into the water then DAB, do not rub, DAB the cartridge where the ink flows out - without wetting the little circuit board.
On trick for ink cartridges is to heat up a cup of water in the microwave - not boiling, but about as hot as you can stand to sip a cup of tea or coffee. 95% of the time they are using off-brand inkjet cartridges that are cheaply sold - and even when they do work, the circuitry typically fails within a few months. I've ran into the same issue with several of my customers. Shake them up well before installing them.
#1 mistake made when replacing cartridges.
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