Epson Artisan 1430, just over three years old I think, print roughly 3-4 full color pages a week, anyway, the print looked really dark. A nozzle check showed the yellow looked almost like the black. The yellow and black cartridges are next to each other. Do a head cleaning. That fixes it but if the printer sits for an hour the yellow starts turning gray again. I don't think the ink changes color but something makes it degrade into a dark gray output. My plan is to run out the yellow and black cartridges and if it does it on the new ones take it to get repaired. Is that a sensible plan you think? Anyone have anything to say about this?