Spray the inside of your slow cooker with cooking spray.

Pat the chicken drumsticks dry. Sprinkle salt, black pepper, garlic powder, and smoked paprika evenly over the drumsticks.

Place the seasoned drumsticks in a single layer in the slow cooker.

Pour 1 1/2 cups of BBQ sauce over the chicken, ensuring each piece is well coated.

Cover and cook on high for 2-4 hours, until the chicken is thoroughly cooked.

When cooking is complete, transfer the drumsticks to a baking sheet. Brush the remaining BBQ sauce over the drumsticks and broil on high for 3-5 minutes until the edges start to crisp. Serve hot, garnished with parsley or green onions.