I think there are two ways to open a teapot: pouring and boiling.
The pouring method is simple, which can remove mildew, disinfect and warm the kettle. The boiling method is more thorough, and it needs to be boiled with old tofu and sugarcane heads or white sugar.
After boiling the pot, you can determine the type of tea, and choose the method that suits you according to your personal situation and the value of the pot.