For your safety and to ensure the longevity of the device, please use room-temperature bottled or purified water. Water purified by a home filtration system is also acceptable. Do not use tap water or mineral water, as these will easily form limescale when heated, which can clog the internal pipes and prevent the device from functioning properly.
Note:
It is recommended to replace the water in the tank if it has been sitting for more than 48 hours.