The former Green MP faced such gibes as "rope-head" courtesy of another former MP, New Zealand First leader Winston Peters, while in Parliament from 1999-2008.
"When I left Parliament, I had known that I would have to undergo some kind of purification, cleansing ceremony," the 43-year-old -- who has had the dreadlocks almost half his life -- told the Dominion Post.
"It was very clear. It was like, now is the time. I felt like my spirit and my psyche had been polluted by the experience."
Mr Tanczos, a rastafarian, lives in a house bus in Ngaruawahia. He was in a forest when he got a message it was time to cut off his dreads.
"It's not something that one would ordinarily do, but if a person becomes polluted, then it's something that they may well do. It's freed me."
Mr Tanczos has been studying for a postgraduate diploma in management and sustainability at Waikato University and has taken papers in environmental economics and this year will learn Maori.