I don’t know Lamy pens, and isopropyl alcohol damages some pens. I’d read the care guide before doing that.

You are supposed to rinse out the nib and feed periodically. There are several ways to do it, but at least rinse the nib and feed until the water that drips out of the nib isn’t obviously colored, soak it in some water for an hour or so to get even more gunk out, then put the nib point down on a paper towel or something to suck even more old ink out, and then give it some time to dry.

You don’t need to do as much if you’re just refilling it with the same color, but since you’re running into trouble might as well rinse it out fairly well.

That just might fix the problem if it’s built-up dried ink clogging up the pen.

I forget how long I let the diluted ammonia (about 10% household ammonia, 90% water) sit in the cartridge. I don’t think it was overnight.

You said “That’s pretty specific” and gave a definition of “tankie”. The reply “Tankie is a pretty specific term” affirms what you said, and because that’s the end of the reply implicitly affirms your definition of “tankie”. So it does answer your question with “yes”.

I don’t have the skillset to teach conversational implicatures and inference in English, even my own dialect. So I can’t help with all problems like this.

In practice, it’s even more specific, because “tankie” wouldn’t cover a self-proclaimed leftist who claims that Dr. Francia’s dictatorship is a model all states should aspire to. “Tankie” means “self-proclaimed leftist who simps for self-proclaimed Leninist brutal authoritarian states”.

There’s a real chance that my employer will abruptly ban Chinese-branded phones from their network.