I used a metal punch. Kinda like a paper punch for metal. Also have some I use a drill press but, the holes weren't quite as clean. Uh oh...assuming you meant me
I keep my Oakridge stuff in a kitchen cabinet (Oakridge seem to be well sealed) and the plastic jars in a cambro downstairs. Still get clumping sometimes. I’m wondering if the small desiccant bags would be food safe
Buy a bag of beef jerky (Jack Link's or Oberto - sacrilege, I know) eat said jerky, put the little packet from inside the jerky bag in your Rub container, especially if it's a smaller jar, like 1lb or so... those are food safe and should last a while to keep moisture at bay...
I had a good friend who was a spice salesman. Used to to give me all the spices I needed. Told me to store in mason jars in the freezer. he's retired now , so no more freebies, but the spices in the freezer seem to retain all their freshness. YMMV