Pick out as much of the dried glue as possible with your fingers.
Mix 1/4 teaspoon mild liquid dish washing detergent with one cup of warm water. Do not use a detergent that contains bleach.
Dip one corner of a clean cloth into the solution, and apply it to the dried glue stain. Gently agitate the carpet fibers, but do not rub the dried glue into the carpet.
Let the solution sit on the carpet for several minutes until the dried glue has been loosened.
Continue to blot the stain with the cloth until you remove all the glue.
Rinse the area with cold water from a spray bottle. Using a spray bottle will prevent you from overwetting the floor.
Blot the area with a dry towel to remove all the excess moisture.