It's one of those things that you always mean to do, but put off from one day to the next, month over month. Every time my pen gets empty (1-2 weeks), I mean to clean it, but figure that leaving it alone for another 2 weeks won't hurt. Up to the point where I haven't cleaned it now since Spring quarter (~6 months). My pen's performance showed it. So this is a friendly reminder: CLEAN YOUR PENS EVERY MONTH!!!
It made all the difference. It's writing like new again.
The 10 Tips for a Good Maintenance of your Fountain Pen
Fountain Pen Maintenance
General guide to using fountain pen