Trim the wick to 1/4 before each burning. Place the candle on a heat-resistant surface or on a candle tray. Allow the wax to melt to the edge of the candle/container at each burn to prevent tunneling. Keep candles away from drafts to ensure a smoke-free, clean burn. Use a candle extinguisher to put out a candle without soot or smoke. Stop burning a candle when there is less than 1/4 inch of wax left. May cause an allergic reaction.