I've just noticed this thread and I have to challenge the idea that hexe can be left for years and will function perfectly. It will absorb moisture over time and while it will still burn when damp, it is more difficult to light and puts out less heat, presumably because of the energy required to drive off the moisture content. If it gets really damp it will flake and crumble.
You are probably safe enough with it in a dry, warm climate, but here in England, it is necessary to store it rather carefully.
Those are good points. I do keep mine sealed in a Ziploc bag, and I've had good results with that. They will also crush and turn to powder if not protected.
Still, and this is important, they are not like Wetfire tinder. If Wetfire's packaging gets compromised, the tinder will quickly be rendered useless.
On the other hand, with hexamine, even if the packaging is compromised and it does absorb some water,
it will still burn.
HJ
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