Hi everyone, last year I bought 2 yards of bulk salt on December 07, my understandings was I had to keep it dry so I did, I put all inside trash barrels with caps and stored it inside my building (no heat), used it all winter. This year I bought 2 yards again from different dealer did the same process, salted couple times in December and now on January 20 storm, it was all good, temperature dropped to 4F here in Boston Sunday- Monday, on Wednesday I went to check on my salt it’s was all frozen, now temperature is in 50F and still frozen, why it happened? Any thing I can do to save it? When I buy again what should I do different? Thank you.