How do you fix a disc that won’t read?

How do you fix a disc that won’t read?
5 Ways to Repair a CD or DVD

Clean the disc using a soft lint-free cloth and a dab of warm water and mild detergent.
Fill scratches with toothpaste.
Soften scratches with heat from a 60W lightbulb.
Fill the scratch with a wax-based product.
Cover holes in the data layer with pen and tape.

5 Ways to Repair a CD or DVD
  1. Clean the disc using a soft lint-free cloth and a dab of warm water and mild detergent.
  2. Fill scratches with toothpaste.
  3. Soften scratches with heat from a 60W lightbulb.
  4. Fill the scratch with a wax-based product.
  5. Cover holes in the data layer with pen and tape.