Most fountain pen issues can usually be fixed by a good, thorough, cleaning. If the nib is scratchy, its tines are likely misaligned, and need alignment. You'l

Most fountain pen issues can usually be fixed by a good, thorough, cleaning. If the nib is scratchy, its tines are likely misaligned, and need alignment. You'll need a 10x (or better) jeweller's loupe to check the tines for alignment. More complex solutions for more complex problems exist, but these are the most common by far. It is possible to pick up these things by watching videos, but I'd recommend you to make contact with your local fountain pen club - such things do exist :)