HOW TO REMOVE GLUE FROM GLASS
To remove glue from glass surfaces, try a combination of manual and chemical methods. Apply petroleum jelly, nail polish remover, vinegar, or oil (alternately, oil-based substances like mayonnaise or margarine) to the area. Saturate fully and gently work the glue away with a scraper or scouring pad.
Another method for removing glue from glass, is by varying the temperature. Soak the area with warm water, then scrape away glue. Soaking the glass overnight in hot soapy water can also help loosen the adhesive. If this doesn’t work, try acetone or alcohol, testing on a small area first in case of damage to the glass.