I used to know the answer to this, but of course now that I need it, I forget.
Each time I get a bad nozzle check on my 4880 (or other wide format Epson), I do a cleaning and then another color drops out. It’s usually the same one or two colors. I was thinking it was the capping station, but now I think I’m remembering it’s the dampers. That might make more sense due to the fact that cleaning causes ink to run through the lines quickly.
What do you think?