Everything prints pink! Head cleaning help on

I have a Canon S9000 and when this happened to me it was because the magenta or photo magenta cartridge leaked and spread. I had just refilled the cartridge and the plug didn't have a tight enough seal.
I took out the cartridges and used a Q-tip, OK, a TON of Q-tips, with the cleaner fluid from the refill kit on them and cleaned out the bottom of the holders where each cartridge fits.
I also had to do this to the ink ports of the cartridges themselves because they were tainted as well. I ran the head cleaning program a couple of times and once it was as good as it was going to get, I repeated the cleaning of the holders again, bought all new cartridges and ran the head cleaning program again until the problem was gone.