Just recently began refilling Canon MP560 cartridges. I used to have a 6700D and had no trouble refilling those cartridges. When I got to the big black cartridge (220) I had lots of trouble with it leaking. I had not put it into the printer. Over the next 2 days I tried refilling it and all the ink would run out the round hole on the bottom. It was a slow leak. I thought by waiting a day and giving it a try again perhaps it would work. It didn't it just kept leaking. I did the top hole refill and did have it sealed properly. What should I do now to get this cartridge to fill or do I just have to dump it out and start fresh? Thanks for any help