Anne, thank you for the comments. I don't understand how to upload/post pictures on this site and am tech challenged, but thank you for suggesting ! I should explain that the pans have tiny indentations inside which are to make the baked batter look like little ears of corn. Well, I put the pans in the oven at 400 deg and it started smoking badly and stinking up the kitchen. I turned off the oven and took out the pans, wiping off what was able to come off before it cooled down. I scrubbed some more with baking soda paste and wire brush which did little but made the brush stained. I also put the pans in a bigger pot of water and boiled for a time and tried to wipe/scrape off, but not much came off either in the water or by hand. Then I thought to try some hand cleaner/degreaser that I had in the laundry room. To my delight the label said it was made with orange oil and contained no petroleum derivatives! So I put a tiny amount of the paste in each section of the pans and using my finger and a fine wire brush worked it in. Then I washed it off well. The pans came out quite clean! They are not sticky and gummy and still looked like they had some "cure" left to them, so I put them into the oven to dry off so they wouldn't rust. I preheated the oven to 400 deg again as I wanted to bake what I had prepared. Before adding the batter, I sprayed a little bit of Avocado oil inside and wiped with paper towel, added batter and baked. I didn't remove them immediately from the oven or from the pans and so they stuck tight (but not burnt) and need to be worked out in pieces, but the pans are looking good and should wash clean easily. Next time I might spray the oil without wiping. The batter is a gluten free recipe with no shortening or leavening which is more challenging to achieve a good 'bread' so I'm still working on that, but at least I have the clean pans I needed. Thank you all for your interest and help!