http://www.morfon.com/inkjet-cleaning/

How do I use the cleaning solution that is included in the ink refill kit NCR?
This solution is intended to be used cartridge to clean the jet holes. Use a lint (Brand Scott) paper towel. Pour some solvent in the towel and slowly run the cartridge gently from side to side until the color no longer is so cool. Let it stand about a minute to dry and reinstall the cartridges. You may want to run the printer cleaning once, just to clean out remaining solvent from the aircraft before trying to print a page. Hope this helps
ink cartridge cleaner