Missing the biggest lesson I learned in the course of using them for almost half a century:

- when the pen goes dry, clean it thoroughly before refilling or replacing the cartridge

Back when I was writing a lot I was able to remember to do that every other time, but these days, it just gets done each and every time.

The other issue is how long a pen can be left with ink in it:

- days are okay - weeks are probably okay - months are not okay

So, unless confident you'll be using it again in a week or two, empty, and flush and dry thoroughly before putting away.

And a final recommendation --- try an italic or stub nib, and get a book on Chancery Italic:

https://sites.google.com/view/briem/free-books

or see:

https://www.handwritingrepair.info/