I bought this pan mid May, I received it on May 23, I hand wash my dishes, it’s never sat it water ever. I just noticed it’s starting to warp. I’m so mad, I spent the $$ on this because I thought it would be better than all the ones I bought before that warped after a few months. I use for pancake’s, grilled cheese, warming tortillas etc. But to not even last 2 months. I’m beyond upset. I have the Calphalon stackable set, the round grill pan & the deep pan. So I’m upset.