I got one of them big buckets of salt awhile back. It was all powder when I first got it. Now the top 8" of it is hard as a rock. I just spent 45 minutes chunking it up with a big butcher knife. I rolled the bucket around on the floor to mix the lower layers of powder with the chunks on top.\n\nWHY? I live in Colorado. It's drier than a popcorn fart most of the time. Can't be moisture from the air. Could it? I keep the lid tightly closed all the time. The only time I open the lid is when I need to mix up more water. Maybe 10 minutes-\-then it's sealed up tight again. I can't see the salt absorbing water from the air that fast. And it's only like 20% humidity here in Colorado-\-at the most. Usually it's around 15% humidity\n\nDo you guys in the humid climates experience this problem? What can be done about it?\n\nIs it humidity from the air? Could I have a bad batch of salt? Could this explain my recent chemistry problems?