[header] How to prepare the interior of your car for storage [title] Vacuum the interior of the car. [step] Make sure you lift all mats so that you can thoroughly clean door panels as well as the trunk and other storage areas inside the car. Don't forget the glove box. 
If you have stains on the carpet or upholstery, clean them and dry completely. Dirt left in the fabric or carpet is a source of moisture that could lead to damage.