Write an article based on this "Consider the cooking time. Check the baking tray or sheet. Review your storage methods."
If not cooked long enough, the biscuits or cookies can remain too soft. The baking tray or sheet is important when baking biscuits or cookies. Too slim a base, and they can burn; sides that are too high, and the biscuits or cookies can cook unevenly, leaving some of them too soft. If the biscuits or cookies came out fine but have gone soft since, some of the following might be the cause:  The biscuits or cookies were not allowed to cool on the tray/sheet. Resist moving them too quickly from the tray/sheet - a little of the cooking time continues the tray/sheet. Simply loosen them, leave on the tray/sheet to cool for a short time, then move to the wire cooling rack to cool completely. The biscuits or cookies were placed in their storage container before they had fully cooled down. Warmth brings moisture with it and if you transfer biscuits or cookies that are even only slightly warm to an airtight container, you effectively trap the moisture in, creating a perfect softening environment. Wait until the biscuits or cookies are cold before storing. The storage container is not airtight. Any air getting into a container will cause biscuits and cookies to soften. Replace with an airtight container.