I've used clay bakers for my breads exclusively for a couple years now and have never had any problems with "stickage". I use the no-knead method and put the wet dough (after it's been proofed for at least 18 hours) straight into the cold clay bakers. No foil, no oil, no soaking, no butter, no parchment. Just dough against clay. Set oven to 450* for about 35 minutes, then remove the top of the clay baker and continue to bake for another 10 to 15 minutes, until nicely browned. The results are perfect every time (IMO anyway.) Tried to post picture but it's not displaying...