Care Instructions link below
http://www.conwaystewart.com/care_fountain...4f5868245109809Just in case it is not convenient to click on the above link, here is the information below.
Care of Your pen
Care Instructions - Ink Cartridge 
1. Remove the cap and unscrew the nib section from the barrel.
2. Remove the empty ink cartridge.
3. Refit new ink cartridge ensuring cartridge is pushed firmly into the front section (nib holder).
Cleaning the Pen:
Flush liberally with warm water by holding nib section under a running tap or alternatively soak nib holder in a bowl of warm water until all ink deposits have disappeared. do not soak pen barrel or cap.
Care Instructions - Converter (push-in version)
1. Remove the cap and unscrew the nib section from the barrel.
2. Remove the ink converter.
3. Submerge the top of the ink converter in ink. Twist the top of the ink converter clockwise to draw ink into the chamber and refit when full
Cleaning the Pen:
To clean pen, immerse the nib in warm soapy water and repeat the filling procedures above. repeat the filling and discharge procedure several times to prevent any cross contamination of ink colours.
Care Instructions - Lever Fill
1. Remove cap, lift lever up from barrel.
2. Insert nib into ink bottle ensuring nib is completely submerged below surface of ink.
3. Pull lever foreward towards nib until resistance is felt (75-90 degree angle to the barrel).
4. Repeat foreward and backward action with lever for 2-4 times until no further air bubbles can be seen escaping from nib.
5. With a tissue or similar material wipe clean the front section of the pen to remove any excess ink from the filling process.
Cleaning the Pen:
To clean pen, immerse the nib in warm soapy water and repeat the filling procedures above. repeat the filling and discharge procedure several times to prevent any cross contamination of ink colours.
Care Instructions - Button Filler 
1. Remove the pen cap and unscrew the blind cap on the rear of the barrel.
2. Immerse the nib completely below the surface of the ink and press button down on the barrel - release button, but keep the nib immersed for a further 10 seconds to give time for the rubber bladder to pull ink up to maximum capacity.
Cleaning the Pen:
To clean pen, immerse the nib in warm soapy water and repeat the filling procedures above. repeat the filling and discharge procedure several times to prevent any cross contamination of ink colours.
I hope the above helps.
Kind regards,
Mary Burke