1. Turn on the power first, turn the switch to high grade, and preheat for 5 minutes to 10 minute.
2. Secondly, turn it to a low temperature and put the hot salt pack on the part of the body that needs hot compress.
3. Then, hot salt packets can be used for 30 to 60 minutes. If the temperature of the hot salt bag drops during use, the power switch can be adjusted to a high level in time.
4. After the final hot compress, put the hot compress salt bag in a dry place for later use.