Check this one out on ear candling or “coning” -

quackwatch.com

More recently, two investigators tested candles to see whether the wax accumulated after burning came entirely from the candle or included wax that came from the ear. To do this they burned candles with the tip (a) inside the ear, (b) outside the ear, so the wax dripped into a bowl of water, and (b) inside the ear but with a tube in place that would permit ear wax to move into the tube but would block candle wax from moving downward. They demonstrated that all residue originated from the candle and that no ear wax was removed from the ear [2].