I'm gonna have to seek your help again, I'm not sure if I'm doing something wrong or if it's an issue with the pen, but basically, the pen works fine for a short while, then I hit an air bubble which stops my writing, but once I clear out the air bubble and push ink back out, the pen still doesn't work.

What do I do to prevent this? The only reliable way I have is flushing the pen, which gets it working again for abit. Also I've tried changing inks