I've always used distilled water. In addition to fine particles, humidifiers can make all kinds of pathogens airborne, so, I bought one [0], which uses UV to di

I've always used distilled water. In addition to fine particles, humidifiers can make all kinds of pathogens airborne, so, I bought one [0], which uses UV to disinfect the water before ejecting it in the air ultrasonically. [0]: https://crane-usa.com/product/1-3-gal-warm-cool-mist-humidifier/ https://crane-usa.com/product/1-3-gal-warm-cool-mist-humidif...