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How to remove chewing gum from a dryer drum
Spray pam cooking spray on the gum.
It's similar to wd-40 in that it lubricates areas and erodes sticky substances, but it's a natural alternative. If you don't have pam or a spray version of a cooking oil, you can use a bottled version of canola oil.
Wipe some canola oil on a cloth and rub it on the gum. Soak the gum in the oil.