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Question: Why do they use so much ink?

Can someone explain why the MFC465CN steals so much ink? I don't use color in printing and I also set the grayscale and paper to the settings that is supposed to save ink. I did not know that I was giving Brother permission to steal from me when I purchased their product. They use way too much ink. They claim that it is for system performance that the machine cleans itself even when you do not use it, but I call it stealing when you can't control your own preferences to clean the machine. If someone is will to pirate a software program to allow the user to select when cleaning of the heads are done I will be the first to purchase it.
Very dissatisfied