This is pretty much spot on. Iv read and heard of many different ways and theories but this is what I have done, been doing and know to work. Boveda pk's will charge. The Fuente packs will too, but what you dont know is they will actually mold and the sides to the packs will split letting out the insides so I dont recommend charging them. I use a spray bottle and spray the packs just like I do my Heartfelt beads. I soak the packs, usually a good 5 large and 10 small at a time and Ill spray about every other day for a week. They are nice and fat by then. You know they are good when your Tupperware is dry. I've charged even the bone dry, hard crispy, flat packs. Same thing, soak them bad boys and give them time in a air tight container. It will take longer and it helps to massage the pack allowing the substance inside that became hard to break up.
Once they are charged, store them in a zip lock bag until you are ready to use. Iv been using the same packs for years! I bought two boxes of the big and two boxes of the mini's. Between then and my beads, no issues!