I make it every year and I don't use lime, citric acid or any other preservative if you choose to add salt to it it's only for taste and nothing else, I boil it for 2 hours in a large pot on the stove , fill the jars and seal if there are any nicks in the jars air will get in and the juice will spoil so make sure that the metal lid is well sealed and you will hear a pop when they do seal , you can make salted sauce or unsalted if you wish.