The weed that you're talking about sounds fresh because it's still moist. The stuff that crunches is probably older. Don't keep it airtight, and leave it in a paper bag to keep the light off of it for a day or so and it will be fine. Of course, if you want to store some for the future, and keep it fresh, you can put it in a ziplock, Mason jar, etc. Again, keep it in the dark and light-proof.