How is one supposed to use the Udi for it to be effective, based on the text?

Based on the descriptions in Chapter 33, Udi can be used in several ways. For daily spiritual and physical maintenance, the text suggests applying Udi to the body after face-washing and bathing. It also recommends drinking the Udi along with Charanteerth (holy water from feet) for purification. In cases of specific, severe illness, the text provides an example where Sai Baba himself directly applied Udi to a very weak girl to initiate her healing. It is also mentioned that a man with insomnia was told to take the Udi for three days, implying it can be consumed orally as a remedy.