I manage an Orange Leaf store in Ky. I can assure you that the machine that the peanut butter yogurt is in has always been in that same machine, the last one on the row. This way when we stir yogurts, clean machines, change flavors etc, and we know that the peanut butter will NEVER contaminate another yogurt. Separate buckets, spatulas, rags, etc are used for the peanut butter and never for any other yogurt. As far as the toppings bar goes, no one can guarantee that things will not get cross contaminated even as hard as we try. So, we always get the toppings straight from the coolers or boxes. No problems yet. My grandson is deathly allergic to peanuts, carries epis, but comes in at least once a week. Hope this helps. Come by and see us:)