To sterilize jars, wash them with hot sudsy water and rinse well. Place clean empty jars in a large pot and completely cover the jars with water. Bring to a boil over high heat. Once the water reaches a full rolling boil, boil the jars for 15 minutes. Turn off the heat and let the jars stand in the hot water for about 30 minutes. Remove from the pot and fill while they are still hot. You can sterilize the lids in boiling water for 5 minutes.