Pen Maintenance Basics: Keeping Your Fountain Pens Writing Perfectly

A well-maintained fountain pen will write reliably for decades. Some vintage fountain pens from the 1940s and 1950s still write beautifully because their owners cleaned and stored them properly. The maintenance required is minimal—far less than most people expect—but skipping it leads to problems that can be frustrating and, occasionally, permanent.

Here is how to keep your pens in excellent condition.

Routine Cleaning: The Most Important Habit

Clean your fountain pen when:

Changing ink colors
The pen has been sitting unused for more than two weeks
Ink flow becomes inconsistent (skipping, hard starts)
You notice the color has changed (contamination from old ink)

The Basic Cleaning Process

For cartridge/converter pens (Pilot Metropolitan, Lamy Safari):

Remove the cartridge or converter
Hold the nib and grip section under cool running water (not hot—heat can damage feeds)
Gently flush water through the section. With a converter, fill and empty it repeatedly until the water runs clear
If ink residue persists, soak the section in a cup of cool water for 2-4 hours, then flush again
Shake out excess water and let the section air dry on a paper towel, nib down, overnight
Reassemble when dry

For piston-fill pens (TWSBI Eco, Pelikan):

Empty any remaining ink
Draw clean water into the barrel using the piston mechanism
Expel the water. Repeat 5-10 times until the water comes out clear
For stubborn residue, let the barrel sit filled with water for a few hours, then repeat flushing
Empty completely and let air dry with the piston extended

For eyedropper pens:

Empty the ink
Rinse the barrel and section separately under cool water
Flush the section as with cartridge pens
Dry all components before reassembling

Cleaning Solutions

For most cleaning, plain cool water is sufficient. Fountain pen inks are water-based and dissolve readily.

For stubborn residue or ink that’s dried in the pen:

Pen flush ($8-12 from Goulet Pens, Anderson Pens, or JetPens): A mild cleaning solution designed for fountain pens. Fill the pen with flush, let it sit for an hour, then rinse with plain water. Effective for removing dried ink, shimmer particles, and buildup.

DIY pen flush: A few drops of clear ammonia (not sudsy) in distilled water, with a tiny drop of dish soap. Cheap and effective. Rinse thoroughly with plain water afterward.

Never use: Rubbing alcohol (damages rubber and plastic components), ultrasonic cleaners (can loosen adhesives and damage feeds), or hot water (can warp feeds and stress plastics).

Ink Maintenance

How you handle ink affects your pen’s health:

Use quality inks. Reputable fountain pen inks (Pilot, Sailor, Diamine, Robert Oster, Waterman, Pelikan) are formulated to be safe in fountain pens. Avoid India ink, calligraphy ink, and any ink not specifically labeled for fountain pens—these contain shellac or particles that will clog your pen permanently.

Don’t mix inks in the pen. Mixing different inks can cause chemical reactions that produce sludge or sediment. If you want to try ink mixing, do it in a separate container first and test for compatibility.

Use your pen regularly. Ink left sitting in a pen for months will dry and become harder to clean. If you rotate between many pens, try to use each one at least weekly. For pens in long-term storage, clean and empty them first.

Shimmer ink precautions. Inks with metallic particles (shimmer inks) require extra attention. The particles can settle and clog the feed. Use shimmer inks in pens with medium or broader nibs (not extra-fine), shake the pen gently before writing to redistribute particles, and clean the pen more frequently. See [INTERNAL: ink-sampling-guide] for more on specialty inks.

Nib Care

Don’t press hard. Fountain pens write by capillary action—the ink flows through the nib’s slit to the paper by surface tension. You don’t need to press. Pressing hard spreads the tines, changes the ink flow, and can permanently damage the nib. Let the pen’s weight do the work.

Don’t lend your pen to people unfamiliar with fountain pens. This sounds precious, but ballpoint users instinctively press hard. A well-meaning colleague can spring your nib in one sentence.

Nib alignment check. If your pen starts writing scratchy or inconsistently, examine the nib under magnification. The two tines should be level—one shouldn’t be higher than the other. Minor misalignment can be corrected by gently bending the high tine back into place with clean fingers. For major issues, consult a nibmeister.

Tipping material. The small ball at the end of each tine is the tipping material—an iridium alloy that’s extremely hard. This is what contacts the paper. It wears slowly over years of use but is essentially permanent for most writing lifetimes.

For a detailed look at nib types and their care, see [INTERNAL: fountain-pen-nib-guide].

Storage

Cap on. Always store fountain pens capped. The cap prevents the ink from drying in the nib and feed. Leaving a pen uncapped for even a few hours can cause a hard start (when you need to scribble to get ink flowing again).

Nib up or horizontal. Store pens nib-up in a cup or case, or horizontal in a pen tray. Nib-down storage in a pocket is fine temporarily (clips exist for this reason) but long-term nib-down storage can cause ink to leak into the cap.

Avoid temperature extremes. Don’t leave pens in a hot car (ink can expand and leak; plastic components can warp) or in freezing conditions (ink can freeze and damage the pen).

Pen cases and rolls. For transport, a pen case protects against drops and scratches. For desk storage, a pen tray or cup works. For long-term storage of pens not in rotation, clean them, empty the ink, and store them in a case or drawer. See [INTERNAL: pen-storage-solutions] for dedicated storage options.

Troubleshooting Common Issues

Hard starts (pen doesn’t write immediately):

Check the cap seal—is the cap closing fully?
The ink may be drying at the nib tip. Touch the nib to a wet cloth before writing
Some inks are drier than others. Try a wetter ink

Skipping (pen writes intermittently):

Clean the pen—dried ink may be partially blocking flow
Check nib alignment under magnification
The feed may be starved—re-ink the pen fully

Ink leaking into the cap:

Store the pen nib-up
Check that the cartridge or converter is seated fully
Rapid temperature changes can cause burping (ink forced out by expanding air). Avoid leaving pens in hot environments

Scratchy writing:

Check nib alignment
Write figure-eights on a brown paper bag for gentle smoothing
The pen may need a nib tune from a nibmeister ($20-40 at pen shows)

Ink drying in the pen:

Flush with pen flush solution
For severely dried ink, soak the section in pen flush overnight
Prevent by using the pen regularly or cleaning before storage

The Long Game

Fountain pens are tools built to last lifetimes. A $35 TWSBI Eco that you maintain properly will write as well in ten years as it does today. A $20 Pilot Metropolitan, cleaned regularly, will outlast hundreds of disposable pens.

The maintenance is minimal: clean when changing inks, use your pens regularly, store them properly, and don’t press hard. Five minutes of care per month—less time than changing a disposable pen—keeps a fountain pen performing perfectly.

That’s the beauty of the fountain pen proposition: you invest once in a quality tool, maintain it with modest effort, and it serves you for years. In a world of disposable writing instruments, a well-maintained fountain pen is a small, satisfying act of permanence.