Pour tap water into your humidifier, and you’re essentially inviting a tiny mineral parade into your bedroom. Those minerals—calcium and magnesium—don’t evaporate; they get left behind as that fine white dust that settles on your nightstand and phone screen.
It’s not dangerous, but it’s certainly annoying. Think of it as the wallpaper paste of the humidifier world—visible, chalky, and a little too retro for your modern aesthetic.
Fun fact: that white dust is basically the same stuff that makes hard water “hard.” If you’ve ever scrubbed a showerhead, you’ve met these minerals before. They just moved into your bedroom.
