katann, it's not all that difficult to get the cartos OUT. It's IN that is a tad tricky. I think when these grommets are new, they are super tight, and will most likely stretch out a bit with time. I didn't watch the video to fill with a blunt needle. I've been using a sharp one, with the flat edge against the grommet.
Tanks, we love 'em, but they can be messy!