Dragging this one back up...
Quote:
Some inkjets don't keep the heads "sealed" when powered-on, and they'll clog much more quickly than when turned off.
On further inspection, this appears to be the case for my Lexmark. Even though it's USB and should have no distinction between on and off (it turns itself 'on' automatically when you start a print job, e.g.), it 'parks' the heads when 'off'.
It doesn't mention this in the user guide.
On that note, here's a page on Lexmark's site about cleaning the nozzles manually. I just did this and it appears to work.
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