I have an Epson 3800 that I just bought used that I’m trying to set up to make Piezography prints but I’m finding that it has a magenta ink clog that I can’t clear up. I’ve installed a set of your cartridges with PiezoFlush inks and I’ve run enough power cleans and Initial Ink Charges so that all the “colors” are showing just the pale pink of the PiezoFlush. In fact I’ve run more power cleans than I can count and I’ve also repeatedly used PiezoFlush on a strip of folded paper towel under the print head. The PiezoFlush has been in the printer for a number of days now so in theory it’s had a good block of time to work. And I’ve tried leaving the paper towel with PiezoFlush on it under the print head overnight. This all has cleared up the minor clogs with the other colors (which might well have gone away with just power cleans without the PiezoFlush) but done essentially nothing for the magenta, which still shows about half the nozzles clogged when I run a nozzle check. And it’s largely the same nozzles that are clogged.
Any suggestions as to how to proceed from here? I checked the service manual and according to the troubleshooting guide therein the next step is to replace the printhead but of course the printhead is not available except through Epson service centers and the cost to have it replaced that way does not make sense.