1) Before using kettle, please put that into cold water for 24 hours which is better for preparation of kettle after fired in kiln before using for heating water and it is helpful for cleaning the inner of kettle.
2) Available for heating by direct fire or electricity. Alcohol lamp or Electrical stove is recommended.
3) Quick heating and cooling will very badly affect the life of kettle. So please don't pour cold water directly into hot and empty kettle or hot water to cold tea kettle when adding water. The kettle may explode or crack.
4) There maybe water slightly exudes from kettle during long time using, that is because of natural character of sand mud, please don't worry.