How do you fix the dog retraction leash?

To fix a dog retraction leash, first check for any tangles or knots in the cord and remove them. If the leash isn't retracting properly, inspect the mechanism for any debris or damage; clean it gently if needed. You may also want to adjust the tension by locating the adjustment screw, if available, or replacing the spring if it's broken. If issues persist, consider consulting the manufacturer's instructions or seeking professional repair services.