Boveda should last about 2 months in your guitar case, so why didn’t your first set last that long?
Simple. It’s your case.
Imagine you had Tupperware large enough to put a dry guitar and 3 Boveda inside. Tupperware is vapor proof and doesn’t absorb moisture. It would take a few days for the guitar to absorb moisture it needs. The Boveda also needs time to regulate the humidity inside to a stable RH between 40–60%. The thirsty wood in your guitar case will absorb a lot moisture and cases don’t (generally) have a tight seal. Therefore, the Boveda have to work much harder.
Add to this the fact that 75% of the moisture of the Boveda is being used by the wood in the case – not the guitar. There’s a lot more wood underneath the felt/padding of your case than there is in your entire guitar.
It shouldn’t take more than one set of 3 Boveda to get your guitar and case conditioned. (Remember to replace the packs when the entire thing is almost completely rigid.)
If you’ve gone through a set in a couple weeks, your case/guitar were dry and/or your case doesn’t seal well. If you go through two sets in a month or so, you need a new case.
Charles Rutherford
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