Sounds like not a big problem at all. Seems like they’ll just have to use appropriate cleaning methods. Even in the worst case scenario they would probably just have to use food irradiation.

https://www.fda.gov/food/buy-store-serve-safe-food/food-irradiation-what-you-need-know

EDIT

In fact reading my own link i learned that they ALREADY irradiate food that astronauts eat