Updated: added a couple stars due to seller response. They believe in their product, even if I don't and they did what they could to resolve my complaint.
I don't know if I just got a dud or what. I left all 12 bags out all day in direct sunlight as directed. Couldn't even smell them a little bit. Tried to use them anyway. Put some in a shoe locker, and some directly in the shoes. It has had zero effect. Waste of money.