The first burn is the most important. Always ensure the melted candle wax reaches the edge of the glass the first time you burn the candle. A perfect burn the first time should prevent tunneling. Keeping the candle away from drafts will also ensure a more even burn. Ideally use a candle snuffer to extinguish your candle. Keep the wick trimmed to 1cm. When your candle isn’t in use, replace the Tussie Mussie lid to keep out dust and dirt and the wax clean.