Place cans of unopened sweetened condensed milk into crock pot and fill crock pot as full as possible so the cans are completely submerged in the water. It’s very important that no part of the can should be out of the water during the cooking process.

Cook on low for 8 hours. You may need to refill water if necessary.

Allow the cans or jars of caramel sauce to cool on the counter until they reach room temperature before opening.