I spent over 15 minutes attempting to remove IJM Refillable Carts from both of my 3880 printers this morning. It used to be if I depressed the grey release latch and kept it depressed during removal, and or lifted slightly on the cart at the same time, the cart would release after 5 or so attempts. I made numerous (25-40/cart) attempts latching and releasing before I got most to release. It appears there is a design flaw in these carts.
What feature on the cart is the latch? Any idea how to keep from needing this much effort to remove a cartridge?