I own a Epson R3000 that has Cone cartridges installed were filled with CCP inks, and unfortunately used sparingly so two of the ink channels may have dried up.
I did try a few Epson machine type head cleanings to rectify the issue, and in failed attempts may have induced air into the supply lines. I researched a few possible solutions via these forums, and decided to try filling all the cartridges with PiezoFlush and flushing with the Epson Adjustment Utility (the WIC from 2manuals.com and I used the Mac version of the software). The print head and supply lines now appear to be unclogged and working based on a print head test. The issue I have is that I filled all the cartridges with PiezoFlush via the vacuum method, flushed the lines and now my Cone cartridges still have PiezoFlush in the exit chamber. What do I do about this? The exit chamber is confusing to me because it looks like it's always full? I look forward to your support.