My printer pixma TR8620a needed blue ink. I took off the cartridge plastic and wrapper and installed the new blue ink cartridge. Found blue ink on my fingers. Wouldn't wash off, vinegar didn't work, paint remover wouldn't work, paint thinner no, alcohol no, finally tried WD 40 and that helped. I think with time and more washing it will fade away. No response necessary, but people need to know you can't handle the cartridges without gloves, which is what I will do next time. Better safe than sorry!
