> Are these humidifier particles bad at all?
It's limescale, you don't want it in you lungs. Kidney stones also have some relation to it, probably not exactly caused by hard water, but they get their building material from somewhere.
It's limescale, you don't want it in you lungs. Kidney stones also have some relation to it, probably not exactly caused by hard water, but they get their building material from somewhere.
This seems like a “PM2.5 bad no matter the source” theory which isn’t supported at all.