There is no guarantee that the chewing gum wrapper will conduct electricity safely, and it may even cause the circuit to overheat and cause a fire. Additionally, if the chewing gum wrapper comes into contact with other wires or components in the fuse box, it may create a short circuit, which could damage other electrical components in your vehicle or home. For these reasons, it is strongly discouraged from using a chewing gum wrapper to fix a blown fuse and is best to replace it with a new, properly rated fuse.