Thought these were the most wonderful pans for approximately a year. I have a set of 3, I was always careful washing them, never using anything abrasive, they lost their non stick surface. Everything sticks to these horribly now, I've tried using oil, butter and cooking spray and everything sticks still. I contacted copper chef and they will not do anything about it. These are expensive pans, I have other copper chef pans with copper surface that have been wonderful. The blue diamond are junk and I'M sure copper chef company is aware. I will never buy a copper chef product again, a good company would rectify a bad situation. This company is about money only, not a quality product.