When you receive your cookware for the first time and  take it out of the box, make sure to immerse it in hot soapy water with 1 C white vinegar .  Scrub well all over with a sponge.  It takes the manufacturing oil off along with the polishing compounds used to make it shiny and new!  Once you do this, you will never have to do it again.  If you don’t do this and you heat your cookware, it will turn a golden yellow and things will tend to stick to it.