The claim of "lifetime developer" has been such a frustration. I found the e5540c series particularly bad at losing dev. That's why I have some dev for that series still in stock. I'm shocked how many times the developer doesn't even make it to the first PM cycle. I think these machines are meant to be run at high monthly volumes of color. Unfortunately, many of the ones in my territory were sold for speed, not volume, so the color count stays fairly low.
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