1. Cold water, warm water and hot water are generally used to soak vermicelli in warm water, because it won't take too long, and finally the soaked vermicelli will be easily broken because of the high water temperature.

If you want to soak the vermicelli, you can try to add some salt and white vinegar to the warm water of vermicelli. Here, salt can accelerate the foaming time of vermicelli, while white vinegar can make the soaked vermicelli more resilient.

3. It should also be noted that you can rinse the vermicelli with clear water before soaking, because there may be a lot of dirty things on the surface of the vermicelli, so it is better for your health to wash it before soaking.