i soaked my print head in ammonia, water and isoprol alcohol...a lot of ink came out but still didnt print black right...I left in longer (STUPIDLY) in a metal tray...I think the metal reacted with the print head - see pic
...is there anything I can do...Its unclear if I could use a soft tooth...
Not only do you need do empty carts to fill with the solution but you need the chips on them to do the flush...is there any reason you can't use a syringe and push the conditioning fluid through before storing ?