As we were enjoying some peanuts that have been sitting out in the Wisconsin humidity the last several days, this question came to mind:
What do you call a substance (especially a food) that is made softer (less crunchy) after it has taken on moisture from humid air?
The word soft doesn't capture it - there's still some crunch. They're not stale either. Nor is delicious a good choice (my personal opinion). :-)
Sample sentence: "On a hot, humid summer day at the ballpark, the sun's heat kept the original roasted crunchiness of our bag of peanuts. The leftovers that sat home in the kitchen through the following cool, humid spell didn't fair so well; they mostly went _________."
Disambiguation: I'm specifically looking for what you call the substance after it has taken on the moisture (as compared to the ability of the substance to take on moisture).