Self-inflating life jacket works -- a little too well

[Tin-Can]

Have had 2 auto inflating Cabela's brand, this is 3rd season now. Keep them strapped to the back of the seats in the boat, and this summer will be the first summer I have been able to store the boat in-doors out of direct sunlight. I replace the cylinder and bobbin at start of every season, and have had the boat and PFD's out in direct hot sun for several hours at several places. Never had one "self inflate" without being wet. The info I read on mine says the self inflation is cause when the bobbin between the cylinder and the vest becomes wet enough to dissolve the bobbin material, and is designed to dissolve really only when totally immersed in water for 15 to 30 seconds.
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