I had in infestation of those very nasty and very hard to get rid of creatures in my kitchen cabinets some years ago. Ug!
It started by seeing those grey adult moths flying around my kitchen but not immediately knowing where they were coming from. When I finally figured out that everything; any type of grain, rice, flour, cereal, crackers, even boxes of pudding mix, etc., in my kitchen cabinets was infested – every box or bag had tiny holes drilled in them and the contents were full of squirming larvae, I found the larvae in just about everything save the canned goods or sealed jars, all else had tiny little the holes they made and because of the holes, all the contents of the boxes and bags leak out all over the cabinet bottoms, little piles of half eaten moth larvae food everywhere. I ended up having to throw everything out and then cleaning out, vacuuming and when wiping down and bleaching all my kitchen cabinets and even then, I still kept seeing those damned moths for months until I figured out they had also infested a bag of dog food in the pantry in the garage and even after I got rid of that, I still kept seeing those G-D moths for months.
Then one day after my kitchen zombie moth apocalypse and the nuclear purge that followed, I was shopping at the grocery store I used to regularly shop at and while walking down the baking aisle, a couple of those nasty grey moths flew right in front of me and I figured out that this was where my infestation had come from. I went to the front of the store and asked to talk to the manger, let him know that his store had an infestation of Indian Meal Moths, and he completely blew me off, wouldn’t even talk to me. As I was leaving the store after abandoning my half full grocery cart, I spied several mice happily running down the bread aisle. Needless to say, I never shopped there again.
I had exactly the same experience...even down to the store.