Take a small saucer and fill just the lower interior part of it with distilled water.
Take your boveda and lay it on the outer edge so part of it touches the distilled water. If you're feeling adventurous, (and I have done this dozens of times) lay half of it in the distilled water. Yes, directly in the water.
Put it in an airtight container and get as much air out of the container as you can.
Check it in three days.
+++++The most important part of this procedure is making sure that the water does not dry up. If it does, your boveda pack may stick to the saucer++++
I have used this procedure many many many times, and my boveda packs are fine and dandy.