My above printer is not used very much so I believe the problem I have is as a result of lack of use & the ink has dried in the print head. Yes, it does print but the black is not good at all. I have used lots of ink trying to clean the heads & changed the black cartridge 3 times already. I've also attempted to "super clean" the black head by using a special cleaning product which I know from the past is good (specially if used warm). However this has not produced the desired results. I'd like to remove the whole print head with a view to over-night deep soaking but don't know how to remove it from the printer. Nothing seen on YouTube so any help would be most appreciated. The machine is in otherwise perfect running order.