Canon printer Pixma 4700 and compatible ink cartridges (Newent GL18)

Canon PIXMA iP4700 printer, sometimes it just prints, other times it seems a bit of a faff depending on which route / menu I select so we have replaced it with a newer one. There are also half a dozen compatible ink cartidges, although not Canon original but they seem to work fine. It's too old for the African charities but too good to go to the tip.