Maybe the Bay Leaf works - I hope so, I found an entire colony living in my cupboard between the wheat flour, the white flour and the sugar! But I will tell you this - I found them living in the Cayenne Pepper too! It's not all the spices that keep them away. I think maybe just buying smaller amounts of flour and getting rid of it on a more frequent basis is best, along with the bay leaves and keeping it in the airtight container. I had to clean out my entire cupboard!!