Re-hydrating Boveda Packs:
Step 1: Take a mason jar and put 3 things in it; a piece of sterile gauze (a few sterile cotton balls will work), a piece of heat safe plastic to act as a spacer (Something like a keck clip, or a plastic thingy that comes in the box with pizza’s (but make sure it’s clean), and some distilled water. You must only use distilled water to prevent mold and the pores inside the Boveda from clogging. Do not use tap water.
Step 2: Put the Mason jar (WITHOUT A LID ON IT YET) containing the gauze, water, and spacer in a microwave, and bring the water to a boil in the Mason jar. Once it cools down pour off the majority of the water making sure to leave the moistened gauze and spacer in the Mason jar. If you can’t use a microwave, use a sterile piece of gauze (sterile cotton balls will work), distilled water, and boil the components in a pot of water on the stove before pouring and placing the components inside a mason jar. Do not boil the Boveda pack. The most important thing is to make sure everything is as sterile as you can get it
Step 3: Place the Boveda you want to recharge on top of the spacer. Make sure the Boveda’s paper isn't sitting in the water and put a lid on the Mason jar.
Step 4: Put the sealed Mason jar on a level surface like a table or dresser and be patient.
Step 5: In a day or two open the Mason jar and remove your rejuvenated Boveda. (If by chance the Boveda isn't completely rejuvenated put the lid back on and check it again in a day or two until it’s fully rejuvenated. Any that come out of the jar too heavy will lose weight gradually just by leaving them out in the open air. It takes a day or few for any lumpiness to go away, if they come out too heavy. Weigh the re-hydrated pack on an accurate digital scale and if the pack weighs 67 grams or a bit less (the original weight of a large 67 gram Boveda 62% humidipak) then the pack will hold at 62% humidity, or whatever humidiy % Boveda humidipak that you purchased. It’s ok if it weighs a few grams more. For example, a large 67 gram 62% Boveda Humidipak may weigh up to 74 grams.
Step 6: Store the recharged Boveda’s in a dry Mason jar with the lid tightly closed. You may place a hygrometer inside and see if it reads around 62% after 24 hours. Remove the hygrometer and preferably vacuum seal the jar to keep the Boveda pack fresh and stable for longer periods. You can keep reusing the same Boveda until the paper it’s made of tears or wears out. It’s best to rehydrate Boveda packs before they get fully dehydrated. Once the salts inside the Boveda packs become hardened and not as liquidy, it is time to re-hydrate. After re-hydrating, the Boveda packs may not stay hydrated as long as when they were first purchased. It is best to re-hydrate 1 pack at a time.