What was a key part of Sai Baba's daily routine in Shirdi involving the Dhuni and Udi?

Based on the account in Chapter 33, a central part of Sai Baba's daily routine involved the sacred fire, or Dhuni, which he kept constantly burning in the Masjid. Baba would buy bundles of firewood, often from those who had a surplus, and offer these dry logs into the Dhuni. The ash that remained from this fire, known as Udi, was of great importance. The text explains that Baba would apply this Udi to devotees and would not send anyone away empty-handed, giving it to them in the mornings, afternoons, and evenings. This practice of distributing Udi was a consistent and well-known part of his daily activities in Shirdi.