I strung up one of my basses with the only set of Rotosound Swings. I didn't like the feel nor the sound it made, so I was thinking of taking them off and storing them away again if I ever need them again. They're like $25 a set and it'd be a waste to throw them away. Rotos come in individual paper packagings, but if I put them back in, tape up the openings, will they still oxidize and die out?
If they didn't get a lot of salty sweat into the winds, they should be fine- just drop a small dessicant pack in there with them if you have one avail.
I always keep extra strings in a Ziploc double-zipper heavy duty freezer bags with a desiccant pack to keep them dry.