I did that once with an inkjet cartridge...Put magenta ink into the cyan hole. Yeah, that ruined it.I am a newbie.. I read and reread the directions and still managed to pour the magenta color through the wrong hole (air hole) of the refillable Cartridge.. Is it ruined?
(And I could swear I was careful... I even stuck a toothpick in the hole first to see if it came out pink and it did. To this day I don't know what I did wrong...)