My beloved Epson 3880 now has its first terrible nozzle clog. I made a print and the yellows were way off, then did a nozzle check and the yellow is completely missing. Epson Utility shows the cartridge to be over 50% full. Five regular "cleans" to no effect. Then a power clean to no effect. Before I throw in the towel and replace it, my question is could cleaning the print head using Toolman's paper towel technique help? Any other suggestions?