If the water temperature is still relatively low, it should be higher, and 38 to 4 1 degree is appropriate, which is a little higher than the human body temperature.

If the ash concentration is too high, it needs to be diluted with water, otherwise it will corrode the feet.

The correct way is:

Add 100- 150g vinegar to the foot washing water before going to bed. Keep adding this warm water to the water to keep it warm, and put your feet in it for about half an hour.