I just saw this question: Clean Print Cartridge Heads
Now, I just cannot help but wonder... Why would you ever need to do this? I remember having a HP deskjet printer in the past too, which could do this but I never cleaned the heads this way. So why do printers offer this functionality, what does it do exactly. how much ink is wasted this way and best of all: is this really needed?
(Btw, I replaced my deskjet with a color laserprinter due to the large amounts of prints I make, nowadays... This is pure curiosity.)