Shrimp scampi can be dry for two reasons: Too many noodles or overcooked shrimp. It’s easy to overcook shrimp. It cooks much faster than you think, and that makes some cooks second guess if it’s really done.  Shrimp is cooked when it is pink and no longer opaque. You do not want to overcook it! If your noodles are dry, you probably prepared too many noodles and not enough sauce. You could always try mixing up more sauce or just cooking fewer noodles next time.