Extremes of temperature, as well as the extremes of humidity will tend to age luggage. Any American Tourister luggage which is being stored in an attic or basement should be taken out of storage, opened, and permitted to "air" regularly. This will help to prevent mildew from forming as a result of humidity. It also assists in maintaining the normal resiliency of the case itself. Followings storage where extreme temperatures prevail, we recommend cleaning the luggage (see cleaning instructions above).