Prepare the slow cooker by coating it lightly with cooking spray.
Wash and chop the apples into chunks, leaving the peels on.
In a small bowl, mix together the brown sugar, white sugar, cinnamon, salt, and cloves.
Place the chopped apples into the slow cooker.
Sprinkle the sugar and spice mixture evenly over the apples and stir to combine.
Cover and cook on Low for 10 hours, stirring occasionally.
After 10 hours, use an immersion blender directly in the slow cooker to puree the mixture until smooth.
Stir in the vanilla extract.
Continue cooking uncovered on Low for an additional 2 hours, stirring occasionally, until thickened to desired consistency.
Cool slightly, then transfer to sterilized jars or airtight containers for storage.