My LHS sell the CA Bottle lids and spouts really cheap and that is the only thing that gives me trouble with CA ever and the bottles last real well (thanks for the Ammonia trick)... I did actually have some CA in unopened bottles go bad sitting in the Refridgerator, I think it had been there a couple of years though. it is real dry where I live too especially in winter, I sometimes forget the cap and never had a problem. I read somewhere that moisture and Alkaline PH is what sets off CA, I guess the Kicker is made of some high Alkaline soultion and we all know about the Baking Soda trick to set it off. If I lived in Florida I would be religious about puting the caps on as this stuff is expensive!