Stupid question, no such thing! Just out of curiosity I went to my music closet, and from your description it is not to dissimilar to yours, I too order in bulk so I can have up to 50 or 60 sets as back up and also extra spare singles E 's . b's and G's. I inspected a random sample of strings that were 1 year old in in their original box, and they are all fine!
I counted the sets I have 58 sets and 40 spares, my goodness, you may think I'm suffering some residual affect form the Cold war, I'm hoarding stuff like as if maybe someone might push the button at any time
However when I checked some ''spare'' high E, in 9's 10's and 11's and some B 11's and 12's that were 2 years old and out of their main packet and just in their envelope, some of those looked slightly tarnished and probably had the evidence of some very small rust spots
But all the ones that are still in their complete boxing are perfect. No strings other than the
plain steel E and b that are 2 years and just in the envelopes looked affected. If I wanted to I could still use them I would just need to wipe them when I put them on and I would only put them on a practise instrument. If I would have kept those spares in extra packaging or in an air tight container they might still be perfect
So maybe if your are going to store sets think high and dry, and for long storage maybe try an air tight container and leave it sealed until you need to get at them.
It's just the plains steel string that are out of their box and just in their envelope that are the ones that might deteriorated after 2 years or so. Maybe use an air tight container for those
I would like to have a '' sticky beak'' at your Music Room and cabinet! Sounds like fun!
Also your " stupid question has made me realise that I need to protect my spares a bit better in an air tight container or just not keep so many. I know I'm an Aussie but not your typical one if their is such a thing. Now to me running out of strings is like an Aussie running out of beer!!!!!