I can relate to the situation when the sourdough starter was forgotten in the oven and oven was set to pre-heat. I had this incident when I had kept my sourdough starter in a plastic container inside the oven and I set to pre-heat the oven to 350F to bake a loaf bread. I realized this when I started seeing smokes coming out from oven. On opening the oven all was left was a molten plastic with semi-burnt starter. Plastic all over the oven floor. It took me another 2 hours to let the oven cool and clean up the plastic mess. Lesson learnt-Always check the oven before turning it on.

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