I've been using the Boveda 62% packs during my cure and I like them a lot. It seems that by the time my stems are dry enough to snap, the buds are already around 50% humidity and the Boveda packs bring them back up to 62% so curing can complete.
As the packs give up moisture, some of the gel iinside of them hardens and you can feel it as a hard lump when you squeeze them. When they get like that, I stick them inside a jar, standing beside a shot glass full of water. I put a few drops of peroxide into the water if I have it handy. Then I lid up the jar and let it sit upright on a shelf. This rehydrates the packs so I can keep using them indefinitely. The packs aren't in the water, mind you, the water is in the shot glass. The whole shot glass is inside the jar with the packs, dry, alongside it, so they can absorb the vapour but not be touching the liquid.
The Boveda packs are pretty cheap and so are the mini humidity monitors to put in your jars (or other container) which I think you'd want to use in tandem with the Boveda packs so you can monitor the humidity level. You'd probably want to get the monitors first, then add the humidity packs if your bud is too dry. While the optimum humidity level is a matter of personal preference, with the monitor you will be able to determine exactly what that level is, to know what you are aiming for and how far from that target you are. Then you can use the Boveda packs to get (or keep) you there.