Place the lid on the slow cooker and cook on low for 8 hours. Then take can out of slow cooker(use tongs as it will be hot.) Then let it cool for 2 hours. when you open the can of cooked condensed milk, you will have wonderful caramel sauce. The caramel sauce needs to be stored in the fridge and keeps for about two weeks.
This caramel sauce is great with sliced apples. Here is how I served mine. This sauce would also be great with ice cream or apple pie. I once made a pear crisp with it and it was delicious.
This caramel sauce also makes great gifts. Put the caramel sauce in a mason jar or any other container. Place a ribbon on the jar and pair it with some apples. Just let the person know they need to keep it in the fridge. This caramel sauce will keep for two weeks in the fridge.