1. Buy peanut butter, the more oil the better. 2. Apply the peanut butter to the affected area. Mix it in with a toothbrush, because if you, use your fingers it can get messy. 3. Use the toothbrush or comb to work the peanut butter in. 4. Use a dry towel to pull on the peanut butter. 5. Wash out the peanut butter with a good shampoo. 6. Throw out the tooth brush/ comb and the soiled tea towel, or wash the tea towel thoroughly. You can also use silicon, cooking oil, ice, Vaseline, adhesive remover, spray on hair mousse, toothpaste, spray on WD-40, use eucalypts oil, rub the area with alcohol, hand lotion and mouth wash, mayonnaise, or cold cream.
All the peanut butter/mayonnaise answers are good. Freezing the gum with ice will work, too unless right next to your scalp...then it might be a little uncomfortable. Any cooking oil, vegetable, olive, peanut, canola should help too, anything oily.