You may want to use a double boiler. A double boiler is one pot placed over another pot, and the bottom pot has water in it. The water provides heat to the top pot, but it is gentler than a typical burner. [5] X Research source

It only needs to stay at this temperature for about 15 seconds. [8] X Expert Source Ollie George CiglianoPrivate Chef & Food Educator Expert Interview. 31 January 2022. The juice should be simmering but not boiling when it’s at the correct temperature. You can eyeball it, but using a thermometer is the best method. [9] X Expert Source Ollie George CiglianoPrivate Chef & Food Educator Expert Interview. 31 January 2022.

When using a pot, a rack can help you pull the jars out later. If you use tongs, make sure they’re sterilized, too.

You’ll also need to boil the lids for five minutes.

Don’t let the juice cool down before you bottle it, as that reduces its shelf life.