Digital BW, The Print

I'd like to try this on a stubborn Cyan clog. I have a bottom filler,
syringe and a blunt needle, and a couple of exhausted, presumably
sponge-filled carts. Though I have the tools, I've never refilled a
cart. What's the procedure in a nutshell? And thanks for the
suggestions on moving the print heads away from the parking pad!
Bob Bollini