John strongly recommends flushing the pen every
two weeks or between fillings. Use cool tap water since hot water may warp or
affect the pen and components.
If you are not going to use the pen for some
time, flush the ink out with water before storing it. The most common problem
we observe is the result of leaving ink in a pen, where it dries and clogs the
mechanism. When this occurs with permanent ink, you may be left with the decision
between consulting John to perform a custom cleansing of your pen or using a comparable
amount of money to buy a new pen all together.
When you flush your pen,
you can leave it full of water; just make sure all of the ink has been removed.
In the case of cork seals, store the pen full of water.
When you travel,
carry or store the pen with its point up. Barometric pressure and temperature
shifts will cause the volume of the ink to change. If the ink is settled in the
bottom and swells, there is less of a chance for it to rise up and pump out of
the tip and into your pocket or its cap.
Even when you are not traveling,
the pen is best stored point up in case a storm system moves through causing pressure
to change.
In general, it's best if pens are not stored in window sills
or on a lamp-lit or heated surface.