[msrenee]

Because apparently that doesn't count and they still have to prevent cross-contamination.

>Some companies include statements on labels that say a food “may contain” a certain product or that the food is “produced in a facility” that also uses certain allergens. However, such statements are voluntary, not required, according to the FDA, and they do not absolve the company of requirements to prevent cross-contamination.

Basically the options are redo your production process so that there are no traces of sesame or add enough to put it on the ingredients list.