Freeze the shoe with ice for 15 to 20 minutes
Scrape off the hardened gum with a dull knife or spoon
Use a plastic bag of ice if you cannot put the shoe in a freezer
Apply peanut butter to the gum and let it sit for a few minutes
Rub the gum with rubbing alcohol on a cloth
Use vinegar warmed slightly and dab it on the gum
Apply a commercial adhesive remover
Wipe the area with soap and water after removing the gum
Repeat the process if any gum remains