In the Ganeśa purāṇa, one of the upapurāṇas* a set of verses instruct the manner of conducting oneself, including hygiene practices that one should follow.
Prof. Vinayak Rajat Bhat
The author is an Assistant Professor of Vyakarana at the Chinmaya Vishwavidyapeeth. He earned his Ph.D. from the Rashtriya Samskrit Sansthan, Sringeri under the guidance of Prof. Ramanuja Devanathan following on a traditional education under his guru Dr. Chandrashekhar Bhat, Rashtriya Samskrit Sansthan, Rajiv Gandhi Campus, Sringeri. Tweets at @Vinayakrajat