Title: Useless!
Product review: These mats cannot be put at the bottom of the oven, under the coils. They are supposed to be put on the bottom rack. When we put them in and turned the oven on, soon a burning smell started coming out of the oven. The liners basically block the heat from coming up into the oven. I purchased a set before at Bed, Bath, and Beyond that are silver, and sit at the very bottom of the oven. I'll be returning to get some more of those!
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