A wire brush. Handheld, not attached to an electric grinder or something like that.
Cheap wire brushes should be available in most hardware stores. I know that ours carries them in the paint section.
Remove the nozzle and hold it with pliers or something.
I used to use reddit constantly, and did so for years. That level of hostility took over so gradually that I didn’t even consciously notice. I used Lemmy for a few weeks before it really sunk in that nobody had jumped down my throat over a minor, irrelevant issue (like a careless punctuation or grammatical error).
People here tend to give each other the benefit of the doubt, which had become virtually unheard of on reddit. Even when people make replies I don’t agree with, they’re usually discussing the point rather than the way that point is presented.
I will never, ever go back.