Make sure your barrel is dry before storage. It's easier to prevent condensation than remove a stuck load. Just run some dry patches through before loading it and maybe shoot off some primers while it's unloaded. You are simply somehow getting condensation so find out why and learn to prevent it.

I have a room in the very humid basement and leave my gun loaded for weeks. It has fired every single time for me and I've never had a misfire. I guess I get lucky.