I have one. Got it as a gift a few months ago. It did ok at first, but then started doing the same as yours. I write left-handed, and wind up with ink all over my hand every time I use it. It has also gotten hard to open/close.
I like the fact that it has the keyring attachment, and that it's retractable (a pocketful of ink would quickly end that "like", though).
Something I just thought of while typing this was that Fisher makes refills for all sorts of pens. Wonder if any of them would fit the zero-G?
Overall, I like the design, but the quality just isn't there.
Here's a pic for those who haven't seen it (with a couple of Fisher bullets):