I was initially having issues with yellow not printing at all after refilling this cartridge, however in the midst of troubleshooting that issue (which I ended up eventually finding the solution to), the magenta started printing with white horizontal lines in it. I haven't been able to fix it since. I know the cartridge is full of magenta ink, and I've tried cleaning the printhead by dipping it in boiling water, wiping it, and attempting to add 2 CCs of ink. I've also attempted cleaning the printhead with alcohol and as well, I've attempted running the printhead cleaning procedure from the software that came with the printer. I've attempted pushing the magenta ink through by pushing air into the sponge while not allowing any air escape from anywhere but the printhead (that's how I ended up getting the yellow ink to start flowing again). Also, I've attempted leaving the cartridge in the printer for a few hours with the sticker on, and when that didn't help, I tried leaving it overnight in the printer with the sticker off. None of this has helped. I look forward to reading back any suggestions.