I've refilled a Lexmark 12A1970 black cartridge. Some nozzles are blocked. I've dapped it with wet paper many times. I tried taking the ink out but did not get much into the syringe. I've not had this trouble with my other printer so I'm not impressed by Lexmark. Old instructions from JR universal refill ink say I have say to refill as soon as the ink runs out which I didn't. I have filled with a matched ink.