DanniRae
I keep my flour just in it's paper bag in the fridge and so far don't think I get creatures in it. BUT I am off to put my glasses on and check....I will report back!
I had been doing that too, for over 40 years, but two or three years ago discovered that 'all' the flour-containing products in my baking cupboard had been invaded by them, including things like custard powder.
Since then, I have been freezing all new bags of flour until the old ones in the cupboard have been used up, in the case of bread flour, it will be in the freezer for several months.
Then last week, when cleaning the cupboard, I discovered that the blighters were back, but hadn't had time to spread very far this time.
As for whether or not my freezing had been working, I am pretty sure that the answer is 'yes', as the likely 'incubator' in the cupboard turned put to be a flour shaker that my OH had plonked in the cupboard months earlier and which didn't even have any sort of lid on other than the shaker top with big holes in it!
MayBee70. I don't know if that answers your question, but I do think that my freezing has worked, but a vigilant eye is also a good idea so that if the critters get in anyway, they aren't given time to spread and multiply.