Dual 150 Humidifiers for Bedroom Large Room, 3L Cool Mist Top Fill Essential Oil

How should I clean and refill the tank?. Why is the refill indicator light red when the tank is full?. 𝙀𝘼𝙎𝙔 𝙏𝙊𝙋-𝙁𝙄𝙇𝙇&𝘾𝙇𝙀𝘼𝙉: New one-step refilling process— pour water directly from the top opening.

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