While piling up various kinds of strings and knowing that I won't use them all within a year or two, start to wonder about following. - how long are they good for while sitting on the shelf? Since they are polymers, they will age over time. - what's the best way to store the strings, in a dry and cool places, in a refridgerator, ...? - how can I find out how "old" the string is? Thanks, DC.