The glycemic index measures how much a food boosts blood sugar compared to pure glucose. A food with a glycemic index of 28 boosts blood sugar only 28% as much as pure glucose; one with a glycemic index of 100 acts just like pure glucose.
Try chewing some gum, of your choice, don't use mouthwash for a bit (the alcohol can make your mouth drier) reduce your caffeine intake, stay away from caffeinated drinks like coffee, and even soda.