Cleaning fluid for print heads is a special inkjet cleaners, which is used to regenerate clogged printheads. It dissolve dried ink in the solution and return the nozzles in the heads to use. If the contamination is severe and the head fluid is unable to remove it, you should use Nozzle Rocket printer auxiliary cleaning fluid

Strong, colorless liquid for Nozzle Rocket heads is in a 250 ml bottle. It complements the action of yellow internal fluid and it should be used only inside the cartridge . It is very effective, it rinses out remains and deposits of dried ink. You should applied the liquid to the inside of the cartridge in the amount of 2 - 3 drops and then they should be sucked out through the nozzles with a syringe. Then the cartridge should be rinsed again with yellow cleaning fluid or distilled water.