I did experience the same problem once the sponge was completely saturated, it'd start coming out of the hole.
Since then though, I picked up some 2"+ needles online, and have been pushing through underneath the sponge to inside the hole. One needle was ruined by picking up some of the sponge...
New user, hello everyone!
Just wanted to add my two cents to this as I got the Hobbicolors kit and decided to try my luck at the American method for the Canon catridges. I've got a Pro9000 with the CLI-8 carts, and two empties (yellow and pm). I was able to get about 1/4-1/2 full with the...