Cigar mold is a common problem that can ruin the flavor and aroma of your prized cigars. To prevent mold from forming on your cigars, there are several tips you should follow. First, store your cigars in a humidor with a hygrometer to monitor the humidity levels. Keep the humidity between 65% and 70% to prevent mold growth. Second, avoid storing your cigars in a damp or humid environment, such as a basement or a poorly ventilated room. Third, inspect your cigars regularly for any signs of mold or discoloration, and discard any affected cigars immediately. Finally, clean your humidor regularly to prevent mold spores from accumulating. By following these tips, you can enjoy your cigars without worrying about mold.