Spray the inside of your crock pot with cooking spray or lightly coat with oil.
Rub the BBQ seasoning all over the chicken drumsticks.
Layer drumsticks in the crock pot, adding BBQ sauce between layers.
Cover and cook on LOW for 5–6 hours or HIGH for 3–4 hours.
Preheat your broiler. Line a baking sheet with foil and lightly oil it.
Transfer drumsticks to the baking sheet and brush with remaining BBQ sauce.
Broil for 3–5 minutes until edges are crispy and sauce is bubbling.
Let rest for 5 minutes before serving.