Rizki Mulyadi sits half-submerged in a steaming herbal bath, hands folded in his lap and head down.

Mulyadi hopes the concoction he is bathing in — and the Islamic teacher who makes it — will help him overcome a six-year addiction to the drug of choice for many in Indonesia: crystal methamphetamine, or "meth."

The traditional rehabilitation center in Purbalingga village on Java Island says it has treated hundreds of addicts like Mulyadi, 26, with herbal teas and baths, prayer and counseling.