What healing properties of Udi are described in the Shri Sai Satcharitra?

Chapter 34 of the Shri Sai Satcharitra highlights the immense healing power of Udi, the sacred ash from Sai Baba's fire. It is described as a substance capable of curing even the most terrible and incurable diseases. The chapter provides a specific example of a doctor's nephew from Malegaon who suffered from a painful bone-cyst, or Hadyavran. Despite attempts by expert physicians and surgeons using both native and foreign treatments, the ailment persisted. As narrated in Chapter 34, it was only after the family sought Sai Baba's help and he instructed them to apply Udi to the wound that a solution was found, demonstrating the supreme, grace-filled power of Udi where all other remedies had failed.