Crockpot Chicken Barbecue

2 boneless, skinless chicken breasts
1 1/2 cups tomato ketchup
3 tablespoons brown sugar
1 tablespoon Worcestershire sauce
1 tablespoon soy sauce
1 tablespoon cider vinegar
1 teaspoon ground red hot pepper flakes, or to taste
1/2 teaspoon garlic powder

Combine all ingredients for the sauce in the slow cooker. Add the
chicken, try to coat it well with the sauce.