Hi Terry, as mentioned in this blog post, a plastic bag works well when using the tortilla press: Before flattening your masa into tortillas, you’ll need to line the tortilla press with plastic to prevent sticking. Recycled plastic produce bags are a good choice here. Pieces of plastic cut from a zip-top freezer bag work well, too; they’re easy to clean and reuse, and they’re sturdy yet pliable. One option to avoid is plastic wrap, which can wrinkle and stick to itself. Our Tortillas de Maíz recipe recommends preheating your cast iron pan on medium for 5 minutes before cooking the tortillas. 

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