Hmmm, I'm a noob but isn't a snap'n stem almost too dry to start curing??? I thought when the stem bends with a lil' sound is a good call. Snaping means really dry I'd think....perhaps too dry.
They say once you get too dry, you can't go back. I suppose best bet is stick'em inna jar, check in an hour. If they are soggy, take'em back out.
OR do what I've yet to do myself....get a hydrometer from ebay and stick it in the jar, keep'em between 55-60 or so RH (don't quote me and read the stickies here)