Please keep in mind that the body tends to "farm" Candida as long as there are high levels of heavy metals in our systems (mercury in particular.) Apparently the Candida helps absorb some of the toxic load.
I have come across many individuals that have battled with Candida with poor results, until they reduced their mercury levels. Once that was done, it was a great deal less difficult, since they were no longer fighting the tendencies of their own bodies to keep the Candida.