I loved the Fisher space "bullet" pens for awhile until I realized that every single one of them would leak, so when I went to use it, a big linty ball of ink would splotch onto the paper.
In the last 10 years or so that I've used space pen refills, I've only known of two that would occasionally have a blob of ink at the tip when they've been sitting for a while. Is it inevitable that all of them will eventually exhibit this behavior? Is it an indicator that they're running out of ink?
--flatline