That's why you gotta use them with reverse osmosis filtered water. And not one that remineralizes, you can do that later on your own. I have a ultrasonic humidifier, reverse osmosis water filter and air quality sensor, it's all good.
Works wonders, is cheap, and easy to clean. Evaporation happens for free if you let it.
Watch this https://www.youtube.com/watch?v=oHeehYYgl28
Optional follow-ups:
But both types have easy solutions to their respective problems:
- Use distilled water in the ultrasonic.
- Regularly clean/replace wick in your evaporative (or use a water stabilization agent).
Even the article at the top says they measured "0" particles when distilled water was used.
Until reading this thread I thought using distilled water in them was common knowledge. I believe that is what the manual with mine even said.