How to Clean a Fountain Pen: Step-by-Step
By Claire Ashford . 8 min read . Updated June 2026
Cleaning a fountain pen is straightforward once you do it the first time, and it is the single most important maintenance habit for keeping a pen writing reliably for years. The process takes five minutes for a routine flush and up to twenty for a neglected pen with dried ink. You need a bulb syringe , room-temperature water, and occasionally a bottle of Monteverde Pen Flush Solution . This guide covers all three scenarios: routine flushing between ink colors, deep cleaning after a long rest, and handling a pen with dried ink.
The short answer
Flush a fountain pen by removing the converter or cartridge, attaching a bulb syringe to the grip section, and drawing room-temperature water through the feed until it runs clear. Repeat four to six times. Use pen flush solution for iron gall or pigmented inks. Air-dry nib-down on a paper towel before refilling.
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What you need before you start
The minimum cleaning kit is a bulb syringe sized to your pen's fill section and access to room-temperature tap water. That is genuinely all you need for most routine cleaning tasks with standard dye inks.
If you use iron gall inks , pigmented inks , or shimmer inks , add a bottle of Monteverde Pen Flush Solution to the kit. Pen flush dissolves residue that plain water cannot budge and is safe for all pen materials. If you have a neglected pen with dried ink that has sat for months, a Magnasonic Professional Ultrasonic Cleaner handles what soaking alone cannot.
The Goulet Pens Fountain Pen Cleaning Kit bundles a large syringe, pen flush, and a microfiber cloth in one purchase at a lower combined price than buying each separately. It is the fastest way to set up a functional cleaning station.
GVN Fountain Pen Bulb Syringe Set
A set of three rubber bulb syringes in different tip sizes for flushing pens with varying fill sections. The most affordable essential cleaning tool, working by drawing water through the pen repeatedly to flush residue.
Monteverde Pen Flush Solution
A concentrated pen flush solution available in 2oz and larger bottles, designed to dissolve fountain pen ink residue, iron gall deposits, and pigmented ink particles. Compatible with all fountain pen materials.
Goulet Pens Fountain Pen Cleaning Kit
A bundled cleaning kit from Goulet Pens that includes a large bulb syringe, pen flush solution, and a soft microfiber cloth. Everything needed to flush and clean any fountain pen, sold together at a lower price than buying individually.
Routine flush: converter and cartridge pens
Remove the converter or spent cartridge and discard any remaining ink. Attach the bulb syringe to the grip section so it seals against the fill opening. Draw room-temperature water through the nib by squeezing the syringe, then release slowly to pull water through the feed in reverse. Repeat with fresh water four to six times or until the water runs completely clear.
If the ink is stubborn (any iron gall or pigmented formula like Sailor Sei-boku Pigmented Ink or Noodler's Bulletproof Black Ink ), add a small amount of Monteverde Pen Flush Solution to the final rinse water, flush twice with the solution, then finish with two plain-water flushes to remove any surfactant residue.
Air-dry the nib and section nib-down on a folded paper towel for at least one hour before refilling. For longer storage, dry overnight. Never use a hair dryer or heat source on a fountain pen; heat can warp feed materials and loosen cemented sections.
Cleaning a piston-fill pen like the TWSBI ECO
Piston-fill pens like the TWSBI ECO Demonstrator Piston Filler clean from the pen body without removing a converter. Fill the nib section with room-temperature water by submerging the nib fully and twisting the piston knob to draw water into the barrel. Expel by twisting in the opposite direction. Repeat four to six times over a sink.
For shimmer inks or iron gall residue in a piston pen, add Monteverde Pen Flush Solution to the water for the middle flush cycles. Expel and re-fill with plain water for the final two cycles.
TWSBI ECO Demonstrator Piston Filler
Not a converter but a complete piston-filling pen with a visible ink reservoir of approximately 1.9ml. Listed here because writers often move to a piston pen to eliminate converter limitations. The ECO is the most recommended entry-level piston filler.
Pilot Fountain Pen Cleaning Set
Pilot's own cleaning kit including a bulb syringe sized for their pens, cleaning fluid compatible with their inks, and a flush adapter for cartridge-style pens. Particularly reliable for cleaning Pilot Metropolitan, Custom, and Explorer pens.
Dealing with dried ink
A pen that has been left inked and uncapped for days or stored with dried ink for weeks requires soaking rather than flushing. Remove the converter and submerge the nib and grip section in a shallow cup of room-temperature water for two to four hours. Most dye inks will soften enough to flush normally after soaking.
For dried iron gall ink ( Diamine Registrar's Blue-Black Ink ), add a few drops of Monteverde Pen Flush Solution to the soaking water. Iron gall deposits bond to feed channels and require surfactant assistance to loosen. After soaking, flush with the bulb syringe until clear.
Dried pigmented ink ( Sailor Sei-boku Pigmented Ink , Noodler's Bulletproof Black Ink ) in a severely neglected pen may require ultrasonic cleaning of the disassembled nib and feed. Disassemble as much as the pen allows, run the nib and feed in the ultrasonic bath with plain water for three to five minutes, then flush normally. Do not run lacquered, celluloid, or soft-resin pen parts through an ultrasonic cleaner.
Monteverde Pen Flush Solution
A concentrated pen flush solution available in 2oz and larger bottles, designed to dissolve fountain pen ink residue, iron gall deposits, and pigmented ink particles. Compatible with all fountain pen materials.
Magnasonic Professional Ultrasonic Cleaner
A compact ultrasonic cleaner with a 650ml tank and multiple cycle modes. Effective at loosening dried ink from nib feeds and converter threads that soaking and flushing alone cannot clear. Also useful for jewelry and eyeglass cleaning.
How often should you clean
Clean any pen that has been sitting inked for more than two weeks without writing. Clean immediately before switching ink colors. Clean any pen before storing it for more than two weeks. If you use iron gall or pigmented inks , clean every one to two weeks even during active use to prevent corrosion and feed clogging.
For a pen you write with daily using a standard dye ink like Pilot Iroshizuku Tsuki-yo Ink or Robert Oster Fire and Ice Ink , a monthly flush is sufficient and keeps the pen writing consistently with no intervention between cleanings.
Featured in this guide
Goulet Pens Fountain Pen Cleaning Kit
A bundled cleaning kit from Goulet Pens that includes a large bulb syringe, pen flush solution, and a soft microfiber cloth. Everything needed to flush and clean any fountain pen, sold together at a lower price than buying individually.
Monteverde Pen Flush Solution
A concentrated pen flush solution available in 2oz and larger bottles, designed to dissolve fountain pen ink residue, iron gall deposits, and pigmented ink particles. Compatible with all fountain pen materials.
GVN Fountain Pen Bulb Syringe Set
A set of three rubber bulb syringes in different tip sizes for flushing pens with varying fill sections. The most affordable essential cleaning tool, working by drawing water through the pen repeatedly to flush residue.
Magnasonic Professional Ultrasonic Cleaner
A compact ultrasonic cleaner with a 650ml tank and multiple cycle modes. Effective at loosening dried ink from nib feeds and converter threads that soaking and flushing alone cannot clear. Also useful for jewelry and eyeglass cleaning.
Pilot Fountain Pen Cleaning Set
Pilot's own cleaning kit including a bulb syringe sized for their pens, cleaning fluid compatible with their inks, and a flush adapter for cartridge-style pens. Particularly reliable for cleaning Pilot Metropolitan, Custom, and Explorer pens.
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FAQ
Frequently asked questions
Can I use dish soap to clean my fountain pen?+
Avoid dish soap. Many dish soaps contain degreasers and fragrances that are not tested for compatibility with fountain pen seal materials, and any residue left in the feed can affect ink flow. Plain water handles most cleaning tasks; use a dedicated pen flush solution when water is not enough.
How do I know the pen is fully clean?+
The pen is clean when the water expelled from the flush runs completely colorless. A slight tint after many flushes usually indicates ink staining the rubber sac or converter body, which is cosmetic and does not affect performance. If the water still has visible color after ten flushes, try soaking the nib section overnight.
Does cleaning remove the pen's memory of an ink?+
No. A thorough flush removes all residual ink from the feed and converter. The pen has no chemical memory of a previous ink. The only exception is if a previous ink has permanently stained a light-colored translucent section, which is cosmetic only.