I'm using an industrial spot ion blower. They are used in ESD sensitive enviroments, e.g. electronics production lines in factories. No "audiophile" junk, real industrial application,
beter models have ion balance feedback regulation, different fan speeds etc. One can find them on auction sites for $20-$100 depending on a model/condition (new ones in the shops are +/- same price as Furutech). It's important to have a corona discharge one, not the alpha source which emits ions continously but the alpha particle source has to be replaced once in a year.
I suspect Furutech is one of them just put into battery powered handy package and rebranded...and 5x the price.
Cheers