They are Never non stick, even when used immediately after washing with a mild detergent out of the box. We tried to season them without any luck. They stick worse than cast iron in my opinion. In over 60 years of life, these are by far the worst skillets we have ever owned. They’re rather flimsy too, easily dented by our 8 year old cat who pushed it off the stovetop onto the floor. These are absolutely NOT worth the price that we paid for them!!!