Cook the Pasta:

1. Follow the package instructions to cook the pasta.
2. Drain the pasta and rinse it under cold water to cool it down.
3. Drain thoroughly again to remove any excess water.

Prepare the Salad:

1. In a large bowl, combine the cooled pasta with crumbled bacon, shredded cheddar cheese, diced red and orange bell peppers, diced celery, sliced green onions, and minced garlic.

Make the Dressing:

1. In a separate bowl, mix together mayonnaise, whole milk, and dry ranch seasoning until well combined.

Combine and Chill:

1. Pour the dressing over the pasta mixture and stir until everything is evenly coated.
2. Cover the bowl and refrigerate for at least two hours, or ideally overnight for the best flavor.

Final Touches:

1. Before serving, give the salad a good stir.
2. Check the consistency and add more dressing if needed to ensure it's creamy and well-coated.