All of our humidifiers use cotton filters to soak up the water that gets diffused. If you buy a Crystal Plant humidifier, at least one filter is already included with your purchase, so that you can start diffusing right away. These filters can become clogged with time. If your Crystal Plant humidifier isn’t producing as much mist as it used to, probably your filter is just clogged or just old and saggy.
That’s why it’s always good to have some filters in reserve.