Had acquired in May for my Epson D78 cartridges. Although I so prints about 20 pages a month I have only 2 per cartridge per color. Did early December black, cyan and magenta changed and today again. Only yellow seems a little better sein.Ständig I have to press the nozzle cleaning. If I forget this once, I can throw away the expression again. The longer I use these cartridges the worse they are. I will probably revert to original cartridges. These problems I had not so. Who wants to save, save with cheap does not always.