Fountain pen? I love them. But suddenly 15 years went past, and when I opened up my Parker 45, the ink reservoir plastic had perished. I've bought a number o

Fountain pen? I love them. But suddenly 15 years went past, and when I opened up my Parker 45, the ink reservoir plastic had perished. I've bought a number of replacement wells, but none of them work. They use a screw to draw the ink, which gets the ink into the reservoir OK, but it doesn't flow, presumably because there is no ventilation? What fountain pen mechanism are you using? Do you know of a way to rejuvenate a Parker 45?