If this is a manual, non-electrical tortilla press, you can wipe down the surfaces with a dry towel. If it is not enough, you can clean it with hot water and brush. When in doubt, you can always check the manufacturer’s guide that comes along with your press to know more about its cleaning and maintenance procedures. It is also best to use parchment paper, cookie sheet, or plastic when using your press so that your dough won’t stick on the surfaces, hence easier to clean.