It is good to turn on and off the water dispenser frequently, because if it is kept on for a long time, it is easy to melt the insoluble substances in the water. Long term drinking will cause harm to the human body and waste electricity and water.
It's OK to turn on and off the water dispenser frequently. Generally speaking, it's OK to turn it on when you need to drink hot water. If you don't drink it, you should turn it off, because after the water is heated once, some insoluble substances such as calcium carbonate will remain at the bottom. If you boil it again, these insoluble substances will be melted away, and long-term drinking will cause great harm to the body.
Moreover, if the water dispenser is often turned on at ordinary times, it is a great waste of electricity, and there are potential safety hazards, which is easy to cause fire. At the same time, repeated heating of water will gradually reduce the amount of water. Sometimes it has not drunk much, and it has been heated up, which is also a great waste of water.
It should be noted here that even if it is not often used, the inner tank of the water dispenser should be cleaned every three months or so. If it is not washed for a long time, a large number of bacteria will grow on it. After drinking too much, it will cause digestive and urinary diseases.