We have the same problems, in my stored dry foods, I use a double plastic, under the jar lid, and put a half dozen of the Bay leaves on top or even in the jar.
Most of the time it works.
Here, we go over a hundred in the summer, and have about half the summer as humid weather, we call it the monsoon season.
Humid is a fact of life here! We’re only a couple of miles from the Atlantic, if you go by water. If we drive, it’s about 25 miles, by the time you go to the bridges and double back! LOL
Sorry I didn’t get to spend as much time as I would ahve liked on your thread! Have to work sometime! It was really great! Would you add me to your ping list please?! Thanks!