I've had an Epson P8000 for exactly 4 years now without any significant cleaning issues (Mass, so humid in the summer, normal spring/fall but dry in the winter). However it just developed an impossible to clean issue with LK.
It tried an auto clean yesterday and failed and the nozzle check showed 1/2 a dozen or more missing bars from 2 lines. I tried 5 cleans yesterday, 3 normal 2 heavy, LK and PK head only, result may be even a little worse. The manual recommends leaving it for 24 hours and trying again if it doesn't clear so I did, no change (heavy clean) today although I lost 1 bar on the Cyan head so cleaned all. Cyan cleaned up fine but again no change on the LK head. Image attached.
Any ideas? I have read (I think) just to keep trying more cleans, and I will, but wonder if there is anything else I could try. I am intermittently printing on it (2 yesterday, 1 today), just avoiding images with mid to dark continuous tones which I imagine might band.
Thanks
Mike