I bought it from a local B&M shop. Their humidor "felt" humid when I walked in, but I didn't see an RH reading anywhere. I kept it in a ziplock cigar bag (but not humidified) for around 48 hours before smoking it. Could it have dried out that quickly? They told me it should keep for almost a week in the ziplock bag.

Thanks for the tips on purging and tequila. I'll be sure to put both of them to use!