So I'm kinda new to fountain pens and bought a Pilot metropolitan (fine nib) about a month and a half ago. It came with the tines misaligned but I ended "fixing" that after some trial and error, it was still somewhat scratchy and offered some resistance but was usable. After a few weeks of use, it became buttery smooth and was a joy to use but now it writes with some resistance and scratchiness again, it seems to be scratchy only on parts of words and not all the time, though the resistance is constant. I tried to align the tines again but to no avail. It writes better at certain angles but never as smooth as it used to. Am I missing something? Did I do a newbie mistake?