Why is the water in the diffuser hot?

It is quite normal for the water to heat up slightly when the diffuser is in operation. This is due to the ultrasonic plate that produces the mist. Depending on the device and the amount of water it contains, the water temperature can vary between 30 °C and 65 °C. Make sure that the lid remains firmly closed while using the device. To fill your diffuser, first turn off the device. Unplug the adapter and then remove the lid. Never remove the lid while the device is in use!