Cut and Past from the internet.
Cleaning your fountain pen
Unscrew the barrel from the nib section.
Rinse the nib by filling and emptying it with water (repeat this until the water is clear). Caution: Ink residue will flow out.
If the pen uses a cartridge/converter, place the nib section into a beaker or other container of clean water and let it soak overnight.
The water level should completely cover the nib.
Be sure to use room temperature water. Distilled water will work best (tap water sometimes contains particles which may clog the feed). Never use warm or hot water (heat will expand the inner works of the pen) or alcohol, as these will damage the feed or other parts of the pen.
Let the nib soak for 10 to 15 minutes, then blot dry with a paper towel. Soak the nib overnight if necessary.
Wash your pen every few weeks or whenever changing ink colors.
Using your fountain pen
Do not press hard when writing, as this can damage the nib. A good fountain pen should glide effortlessly across paper.
Use fresh ink. Do not use bottled ink that is more than a year or two old. If you do use older ink, you should first examine it for any mold that may be growing on the surface. Then stir the old ink to make sure that there are no lumps or sediment on the bottom (a sign that the ink is solidifying). Thinner inks, like Waterman, Sheaffer or Pelikan, are less likely to solidify than thicker inks. And if the ink has not been used for several weeks, shake the bottle before filling the pen, as the ink particles may have settled a bit
Black ink contains gum arabic. If you allow black ink to dry inside of the nib, it may cause permanent damage. If you do not plan to use your fountain pen for more than a couple of days, clean your fountain pen before the ink has dried.
Store your ink bottles away from direct sunlight to avoid fading.
Avoid using chemically treated paper, which usually has a slick feel, because it does not absorb ink well. Ink will collect in the nib and ultimately clog the feed. If your pen skips after using treated paper, wipe the nib with a lint-free cloth. If this does not work, wash the pen out with water.
When traveling by plane, we recommend that you either fill your converter completely or leave it empty to reduce the risk of leakage. Always keep the nib upright during takeoff. When opening your fountain pen in flight, you should hold the pen upright and remove the cap slowly. Always keep your pen capped when not in use.
Do not loan your pen to anyone, as the nib will adapt to your writing style (i.e., pressure, angle).
If your pen doesn't "start" right away (i.e., after not being used for a couple of weeks), ink has probably dried and clogged the nib and/or the feed. To start the ink flowing again, resist the urge to press down hard on the pen. Instead, wet the point of the nib with water or ink of the same color. If that doesn't work, wash the pen out.
Storing your fountain pen
If you do not plan on using your pen for a prolonged period of time, wash and empty it out before storing it away.
When not using the pen, keep it stored vertically (i.e., in a cup) with the nib pointing up to prevent ink from settling in and clogging the feed.
They are very simple things are fountain pens but the only thing I could think of is that the feed from the cartridge or feeder is blocked, possibly with plastic.