It is for this reason that I am coming to the conclusion that stashing away a kit for years is less than useful.

Having one "to be used" kit and a "to be stored" kit that is rotated gives automatic redundancy and automatic maintenance.

It guarantees that one is comfortable with the equipment and is able to use it when stressed.

It makes it more likely than when needed, the supplies will work and have not rotted away.

The cost is POSSIBLY extra weight.

Conway Yee