The humidity output got very low and I see some pink or reddish slime.

If you see any pink or reddish slime on Miro humidifier, it needs thorough washing. Pink slime is caused by minerals in tap water or spring water. This pink slime in stagnated water can affect the operation of mist-maker and drastically lower humidity output.

If this happens, please soak your mist-maker and fan inside warm water with gentle soap around a minute and rinse it with running water.