It's in the title! =) ;) I'm running Lubuntu 15.04 and can't find out how to clean the printer head/nozzles. I'm sure I've seen it somewhere but I can't remember. And yes, I've got CUPS installed and the correct driver for my particular printer.
Thanks =)
P.S: This might turn into a different discussion if cleaning the head/nozzles doesn't work. =)