There's more. The gum base of chewing gum is made on the same exact machines as car tires. Once or twice a year the factory will shut down tiremaking, clean the

There's more. The gum base of chewing gum is made on the same exact machines as car tires. Once or twice a year the factory will shut down tiremaking, clean the line and do a huge run of gum base. Then they will resume tiremaking. Source: someone who works at a major candy manufacturer