Not withstanding the special needs of the Volt when storing the car for several months, Florida is a hostile environment for all types of vehicles. If you park outside ants and other insects may colonize your car (they are looking for food and someplace that is dry.) Another problem is mildew. Trapped moisture and heat are a perfect combination for growing mold and mildew. I really don't have any suggestions except to drive the car regularly or find a climate controlled parking garage.