<<Disclaimer: Verify this information before applying it to your situation.>> I see corn tortillas in super markets, some are made from flour, however, others sit alongside them made from corn. Does anyone know if these are totally GF. The ingredients say they are but I'm wondering about cross contamination as I can visualize them shutting down the machines from flour and going to corn meal without cleaning them. I tried to call the leading maker of these in Atlanta, however, got stone walled.