Slow Cooker Baby Back Ribs

• 3 to 3 ½ pounds pork baby back ribs (my rack of ribs was 3.25 lbs)

BBQ Rub

• 2 tablespoons light brown sugar
• 3 teaspoons kosher salt
• 2 teaspoons paprika
• 1 teaspoon onion powder
• 1 teaspoon fresh cracked black pepper
• ½ teaspoon cumin

BBQ Sauce

• 2 ½ cups BBQ sauce, your favorite brand (divide 2 cups and ½ cup)