In a small bowl mix together all of the ingredients for the taco seasoning. In a slow cooker add the chicken breasts, salsa and taco seasoning. Cook on low for 4 hours. Shred the chicken using two forks.
Preheat the oven to 450 degrees Warm the corn tortillas in the microwave or in a skillet according to package directions.
Place tortillas one at a time on a cutting board. Place a couple tablespoons of the chicken down the center of the tortilla. Roll up tightly and place onto a greased baking sheet. Repeat with remaining tortillas.
Brush each taquito liberally with vegetable oil. Bake for 10 minutes or until the tops are lightly toasted. Serve with warmed nacho cheese sauce.