After the advent of the CD, the cassette tape fell out of popularity. Although seen as an outmoded audio format, the cassette tape has the sound of an analog recording that some listeners still prefer. Over time, cassette tapes can become worn and damaged, but they can be restored to a playable condition.
Unraveled or Chewed Cassettes
Pull out the tape from the cassette. Pull until the tape is to the end point on the tape heads (cogwheels).
Insert a ballpoint pen into the right-hand tape head.
Turn the pen counterclockwise while keeping the length of tape from tangling as it is being wound back into the cassette.
Turn the pen until all the tape is back in the cassette. The cassette can now be inserted and played in a cassette player.
Baking Tape to Revitalize Sound Quality
Preheat an oven to 130 degrees Fahrenheit.
Place the tape on a baking tray and insert in the oven. Leave for 1 to 2 hours.
Take out the tape and allow to cool. The glue that binds the oxide to the plastic of the tape should be rejoined and improve sound quality.
Cutting and Repairing Damaged Tape
Gently pull out the tape from the cassette casing with your finger until there is room to place a pen underneath. Place the pen underneath and continue to pull out until you reach the damaged portion of tape.
Cut out the entire section of damaged tape. Cut the tape straight to create a clean join for re-forming.
Cut a small piece of sticky tape or duct tape.
Join the two remaining sections of tape with the sticky tape.The two sections should overlap about a millimeter. Wrap the sticky tape all the way around the two sections, and press them together. Wind the tape back in the cassette using the method in Section 1.
The baking process is not suitable for acetate tapes. Use a convection oven, not a microwave.