A high caliber and business-grade steam cleaner can warm water to such a high degree that the steam delivered is fit for slaughtering up to 99% of microscopic organisms. That powerful steam cleaner can destroy mold in your home. Significant mold evacuation can cost a great deal of cash.
It might not appear such a good idea to add more dampness to an area that has already mold on it, however steam cleaners utilize an insignificant measure of moisture and with the correct connections, it is totally protected.