I recently bought the Staub pumpkin, and I've used it twice. Both times, I put a little bit of oil on the bottom prior to adding the ingredients for my stew. I'm cooking on low to medium-low for about 8 hours at a time.
The first time I washed the pot after using it, I noticed (after it dried) that there appears to be a residue or maybe a "dryness," almost like a chalkboard, on the bottom of the pot. When I noticed it, I put a layer of oil on the inside of the pot and let it "soak" for a few days. Now, after the second use & washing, it's worse and more noticeable. It doesn't seem to be anything I can scrub away (I'm not using anything abrasive...just a plastic scrubbie). It seems to be part of the pot now. What gives? I thought these pots were supposed to never need to be seasoned, clean right up, etc.