Why was Boss Dharamsee initially hesitant to eat the grapes that Sai Baba offered him?

Boss Dharamsee's hesitation stemmed from two main concerns detailed in Chapter 35. First, he had a strong personal preference for seedless grapes and disliked the variety with seeds that Kaka had brought as an offering. Second, and more practically, he had been advised by his doctor not to eat grapes without washing them. Being in the sacred space of the mosque, he felt it would be inappropriate to wash them himself, yet he was also reluctant to consume them unwashed. This conflict between his personal aversion, his health concerns, and the impropriety of rejecting a Guru's offering caused him to be deeply 'troubled in his heart'.