Welcome GP - Moisture transfer is a common problem when storing cookies, so be sure to store crisp cookies in their own airtight container. Likewise, store soft/chewy cookies in a separate airtight container.
After all that perfect chocolate chip cookie baking, what’s the use when your batch goes stale in a matter of days? Cookies are great out of the oven, but biting into a hard crumbly mass later in the week is no fun. That’s why you need to understand the science of cookie osmosis, or How to Keep Cookies Fresh.