I have to say, this is a disappointment. Despite the cool physics, I've not been impressed that they were audibly so much better than other world class devices.
It’s only the Tungsten electrode rod that probably needs replacing, as that’s how long they last. Just like on my Magnat MP-02 Plasma’s.
I bought the right diameter rods on ebay got a machine shop to cut them to length and dome shape the end.