Here we have the tools prepped for surgery. You can get away with an eyedropper, but what's fun about that? Go for the danger of the syringe. Oh and I don't condone drinking and operating, but sometimes it's needed.
The secret is to not scratch the crap out of your nib, use a rag, or plastic covered pliers and give it a gentle tug, this pen actually gives a refreshing pop to let you know it's out. Now go clean up all the ink you just spilled if you were not patient enough to wait till your pen was dead.
Rinse in warm water, rinse till it runs clear and then rinse it for another 5 minutes. Trust me. After rinsing--- dry thoroughly with paper towels, or I use an old jar stuffed with paper towels that I put the nib point down in. Acts like a sponge. Make sure all parts including the cap are rinsed clean. No need to pull the metal nib off of the feed, just rinse it all as is.
Because I only have two hands, I cant shoot and fill, but I have 2 cc's exactly of ink here in the body. The nib goes on the same way it came out. I had to put a little more pressure on the way in, but it popped in and sealed nicely.
Without hesitation, the ink started flowing and I have a brand new disposable fountain pen that I won't be disposing of. It's a new good pen. Oh, and I recycled the bottle my beer was in so that's two green things for the day.
More importantly... the Boston Red Sox equipment truck leaves for Florida today. Suddenly it's not so cold outside. Have a great weekend and I will have a fresh pen on Monday.