It was obvious the box had been opened somewhere along the line. It did not include any instructions for first time use, except to say on the stick on card which was attached to the bottom of each pan which said, Let's get cooking! Wash, dry and coat with oil. That's all! I can see giving it a rinse with warm water and drying, but why do I need to oil if it is pre-seasoned? Do the pans need to be oiled after each use? Also, nowhere on the pan or the invoice does it say pre-seasoned.