Lamy Safari Fountain Pen (Limited Edition Blue Macaron)

I keep an eyedropper bottle with pen flush on hand . If a pen gets clogged I put a drop of pen flush on the feed and blot it on a paper towel. The pen should flow smoothly after that.

My father and I have been using fountain pens for years. Basically, the only way to keep the nib from drying and clogging that really works in a sustainable way over the long term is to simply use the pen often enough that the ink doesn't get a chance to dry.
Yeah, it might sound like useless "no-duh" advice, but that is my honest conclusion after years of dealing with the problem across two generations.
The same advice is true for inkjet printers whose ink cartridges dry up.

Anyway, there are a couple of tricks you can try if you aren't going to increase how often you write with the pen:

1) Take a dry paper towel and touch the back of the nib to it and soak the paper towel with about 1 sq. in. of ink. This will pull the somewhat thicker/drier ink through the nib into the paper towel, pulling fresh/wetter ink from the reservoir into the nib. It's basically the same as if you were writing more frequently but you waste the ink on the paper towel.

2) You can drop a tiny bit of distilled water on the nib with an eye dropper and then put the cap back on and let it sit until you use it next. The distilled water will replace the water that evaporated, staving off the drying-up of the nib a bit. Experiment with the amount of water you put on the nib to try to dial it in so that it's just enough water to prevent drying-up but not so much that the ink is made too light.

3) I use this trick on dried-up inkjet cartridge nozzles: it's basically 1+2) above. Wet a paper towel with distilled water, then wipe the nib. This will wash off dried ink, suck some thicker ink into the paper towel, and wet the nib with the distilled water.

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