Getting chewing gum on glasses not only can distort your vision, it can leave a horrible gummy stain. The trick is to completely remove the gum and any stain.
Place the ice cube directly onto the chewing gum. The ice chills the gum, making it easier to remove. Leave the ice on the gum until the gum hardens (about 10 minutes).
Pick off most of the gum with the tweezers. Use the toothpick to clean it out of small crevices.
Spray the GooGone on a clean dishrag. Gently rub the gum stain with the dishrag and the stain will disappear. Again, use the toothpick to get any leftover gum out of small places.