The nurse is administering the initial bath to a neonate who's 4 hours old and weighs 7 lb, 2 oz. His vital signs before the bath were: pulse, 126 beats/minute, respiratory rate, 42 breaths/minute, and rectal temperature, 98.4? F (36.9? C). He has been crying lustily throughout the bath. As the nurse dries him, she notes that his color becomes slightly dusky. He cries weakly and he stops moving vigorously. What's the first action the nurse would take?