I have a friend who just loves these candles - Capri Blue Volcano no.6 which sell for around $28.00 for a 24 oz candle. I found this information on their site thought it was a noval idea to mushrooming since we all trive to NOT have mushrooming from our candles! When burning Aspen Bay Candles, wicks will develop a black "fragrance mushroom". This "fragrance mushroom" is caused by the high volume of fragrance oils which have made our "Fragrances with Wicks" so popular. A wick serves as a straw when burning, pulling the fragrance oil through the wax and releasing the fragrance into the air as it burns. Aspen Bay Candles' "fragrance mushroom" is a constant reminder to you of our dedication to quality and your enjoyment. When a "fragrance mushroom" is formed, gently blow out the flame, let cool, trim wick to 1/8"-1/4" and relight. Without this simple attention, the "fragrance mushroom" could smoke and cause an oversized flame. Kay