The cassava dough can be tricky. Take care to peel away the parchment paper from one side of the tortilla first, then pull it off on the other side. Do not try to remove the tortilla from the parchment paper as it will stick. If this happens, scrape off the dough, shape it into a ball again, and put through the press. The dough is delicate but forgiving. If the dough is too wet, dust it with a bit of flour. Do not add too much or it will dry out and break during the cooking process.