I first heard of them when my wife was completing medical school. A component of her schooling included which holistic/alternative medicines had been shown to work, which were complementary, which had been shown to not work, and which had been shown to be dangerous under modern medical scrutiny. I have personally never used them. I've also never been healed by crystals. I don't think either will hurt you. I just don't think either will help you. The end product you see did not come from your ears.
A amateur video showing that the "wax" comes from the ear candle itself.
I like quackwatch.
http://www.quackwatch.org/01Quackery.../candling.html
Not a bad, but not a great wiki entry.
http://en.wikipedia.org/wiki/Ear_candling
And for more credible sources, try
Pub-Med
http://www.ncbi.nlm.nih.gov/sites/en...t=AbstractPlus
I especially like a second other article at Pub-Med. "Ear candles: a triumph of ignorance over science."
or Web Md
http://www.webmd.com/a-to-z-guides/f...n-ear-candling