Why does my ink run out so quickly?

[AndymAndym]

I have a Pixma MP620.  I bought all new cartriges for it a couple of months ago, have printed only B&W word documents, and far fewer than 100 documents, yet my black is empty, and the magenta and cyan are dangerously low.  The yellow is at half.  I figure I've paid almost $1.00 per B&W page.

WTF?

[chybaskids]

Oh come on. We all know how and in what order to insert our ink cartridges. What everyone wants to know is 1-WHY are the ink cartridges so expensive; 2-WHY they run our of ink so fast no matter what a person does.

I personally don't ever turn off my printer. My Pixma 8620 doesn't run nozzle checks or anything else unless I make it do that. I have, however, bought inks on Amazon for WAY cheaper that last at least as long or longer than the Canon ones do. Plus they're XXL too.  

[Roamin]

If your printer doesn't run regular nozzle cleaning by itself, then your the only Canon printer owner where that (doesn't) happen. After putting a new set of 3rd party inks in the printer and going on vacation for 3 weeks forgetting to turn it off, I came back and found them only half full. The printer is in a dark room so no sun forced evaporation. Canon designed the printer to rip users off.