On the advice of many chowhounds, I purchased a 9.5" De Buyer mineral pan as a replacement for the skillet my husband was using for his eggs in the morning. He's very unhappy with it, says it sticks. I know this shouldn't be happening. He cooks his eggs low and slow and uses plenty of coconut oil. We then just rinse it out and use a brush to scrape off the stuck pieces and then dry and re-oil. What should I be doing different.