Could you describe the power of Sai Baba's Udi, specifically in the case of the man from Bandra who suffered from disturbed sleep?

The power of Sai Baba's Udi is illustrated through the experience of a gentleman from Bandra who was plagued by nightly disturbances. As recounted in Chapter 35, he was constantly woken by dreams of his deceased father. A devotee of Sai gave him a small portion of Udi, explaining its 'strange greatness.' The instructions were to apply it to his head, place a packet under his pillow, and hold devotion for Sai in his heart. The devotee assured him, 'It will immediately remove the trouble; this is its natural tendency.' True to this, the very night he followed the advice, he fell into a deep sleep, the bad dreams vanished, and he became very happy, demonstrating the potent and immediate effect of the sacred ash when used with faith.