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Best Answer: Yes citronella candles work, but their effectiveness decreases with the age. Oil of Citronella is a volatile, liquid oil derived from dried cultivated grasses. It works by repelling animals and insects without harming or killing them. It has a distinctive odour, which repels certain animals..
Paraffin is the most frequently used wax when making a candle. However, soy wax, gels, synthetic waxes, palm wax and beeswax are also used. Some manufacturers use different blends of waxes. A quality candle wax burns safely and cleanly.he liquid/melted wax is drawn up into the wick by capillary action. The heat vaporizes the liquid wax to produce carbon dioxide and water vapor. A candle that is made well, no matter what the candles are made from, will not produce smoke when it is burning.