In general, a solid device for a reasonable price. If you turn it on at full power, the tank will last for the night, maybe a little more / less. At low power - enough for a day. I pour water from a household filter. Additionally, it is filtered by the built-in filter. Of course, if you remove the tank, there is still a "raid" inside, a small one. I wash it every 2-4 weeks. I think with distilled water to try to fill.
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