I got the "waste ink tank full" message. I replace the "tank" which is just a felt pad. Now I need to reset the memory. The Canon people said 'go to a service center', but the cost is more than the printer value. I have a good understanding of electronics, and I'm sure the reset procedure is fairly simple. I did not find this in the 'answered questions', so I would rate this a hard question. Thanks for your help.