I have just recovered a long dead cartridge. All the best advice says once they dry out they are gone forever. I have a fax that has been empty for months and I vowed I would not pay the £60 for a new cartridge, rather throw the thing away. So as an experiment I soaked the cartridge heads in Flush fluid and then injected a little into the body itself. To my horror the cartridge soaked up the flush, it normally stays for days on the window sill getting gloopier. I tried it anyway.......it printed ....just. So then I put in some more ink......it got better. After a couple of cycles of head cleaning it was......almost perfect. It may not work every time.....but it did this time....so it may be worth trying.