2. What if you don't use it every few days or for a while? The operation method is as follows: if the time is not long, it is about one week or 10 days, and it can be heated every 2-3 days in winter, and it can be heated and boiled every other day in summer. If the time is more than half a month, this method will definitely not work. Every time you dry-burn, if you don't add bittern, the bittern will lose its taste because of excessive oxidation. So the best way is to boil and cool, and then store the brine in the refrigerator.