Nyasa-mantra includes acamana, or first drinking a sip of water kept in the right hand. There are different visnu-mantras to purify the body. The gopis, and in fact any householders, knew the process for being purified by chanting Vedic hymns. The gopis executed this process first to purify themselves and then to purify the child Krsna. One executes the process of anga-nyasa and kara-nyasa simply by drinking a little sip of water and chanting the mantra. The mantra is preceded with the first letter of the name, followed by anusvara and the word namah: om namo jas tavanghri avyat, mam mano manimams tava januni avyat, and so on. By losing Indian culture, Indian householders have forgotten how to execute the anga-nyasa and are simply busy in sense gratification, without any advanced knowledge of human civilization.