A type of Clark Zapper does have proven laboratory results in completely eradicating candida after 10 days of daily 21 minute treatments. See www.dragonfly75.com/eng/Medikzap.doc
It's also fairly effective against bacteria in my experience. Yes, you have to supplement with acidophilus afterwards to replace any good bacteria that were killed but this is of no importance compared to the necessity of eliminating the candida.