I did confirm which printer model with the seller before I bought the ink and I let some junk parts sit in the ink for a number of days (all was ok) before I charged up my printer. I messaged the seller again but at this point it's a done deal. I'm planning to pull out the dampers and check their condition (messy task). Is there any way to know whether the head is damaged? All I can see is the manifold on top and the plate on the bottom which look ok.