A natural insect repellent, citronella candles are an effective way to keep pesky mosquitoes away. Infused with the oil of the citronella plant, this classic scent combines a top note of green citrus with a bottom note of fresh clean camphor. When burning your candle for the first time, here are some things to note. Always lit the candle from a distance and not too close to the skin or eye. Keep all objects, including matches and wick trimmings out of the candle's way maybe in a drawer or fireproof compartment. Do not burn the candle for more than three hours at a time to avoid soot. Lastly, keep it out of drafts and store it in a cool, dry and dark place.