Do it Yourself Spa Ear Candle! Sold per pair. The receiver may experience a feeling of pressure being released in the ears or a popping sound as the Eustachian tube opens. An internal filter in good quality ear candles prevents any wax or other residue entering the ear. Once the candle has burnt down to a marker line, it is carefully removed and the flame extinguished in a glass of water. Then the other ear is treated in the same way.