When I clean my cabinets out I always use a vinegar and water mixture and dry well. Then I too use the bay leaf method – Mom always did it so of course I do too and its always worked. I don’t do the freeze product thing – I have heard of it but I think :o ewww then i got dead mealy worms (or whatever they are) in there! What I do is – I have airtight canisters for flour and such when I buy more I open the package and look it over before I add to container. I know someone who does this same thing but if she finds some she takes it back to the store with her receipt and gets a refund.