Possible methods depending on the scratch depth. Fill it with toothpaste! or professional glass filler. Believe it or not, toothpaste can be used to patch some screen scratches. Actual toothpaste, not gel or paste-mouthwash hybrids, must be used. Users should gently massage the paste into the scratch with their fingers using a circular motion. If done properly, the paste should adhere to the scratch and polish it away. Then, use a soft cloth to remove excess paste from the screen.