Slow Cooker Southern Barbecue Chicken

This is finger licking good stuff!  The sauce is the key to this dish.  It is a perfect balance of flavors.  You could use boneless chicken thighs or some pork loin, shred the meat at the end and make sandwiches out of it.  Or you can eat it like we did, on top of rice.  However you want to enjoy it, go ahead and make it.  You'll LOVE it!  Enjoy!
-1 (36 oz) bottle ketchup
-6 Tbs brown sugar
-2 Tbs Worcestershire sauce
-2 Tbs soy sauce
-2 Tbs apple cider vinegar
-2 tsp crushed red pepper flakes
-3 garlic cloves, crushed
-6 chicken thighs, bone-in, skin-on
Coat your slow cooker with cooking spray (up the sides too).
In a large bowl, combine all the ingredients, except for the chicken.  Mix well.  Pour a little on the bottom of slow cooker and spread (to cover all the bottom).  Layer the chicken on top of top.  Pour remaining sauce on top of chicken.
Cover and cook on low for 4-4.5 hours.
Serve on top of cooked rice.