I was gifted a Waterman expert. After a thorough cleaning, with pen flush, I was finally able to test it out with some Waterman Intense Black. It has trouble starting, consistent trouble, but once it gets going it's fine.
I understand that baby's bottom might be the cause, but sometimes the same thing happens even when I'm bearing down with a fair amount of pressure. If something is wrong with the pen, how do I go about fixing it?