Why did Singapore ban chewing gum?

Singapore banned chewing gum because people were placing it on train doors, which disrupted the entire country's train system. As Singapore is extremely small, they need to take extra care to keep the country clean and maintain efficient public transportation. The penalties for violating this ban are severe. If caught chewing gum in Singapore, first-time offenders face fines between $500 and $1000. For those selling gum, the consequences are much harsher - fines ranging from $10,000 to $100,000 and potential imprisonment for up to two years.