Candles usually smoke and drip because of a wick that's too long, draught or lower quality. Trim the wick to about 5–7 mm, place the candle somewhere free from draughts, and choose a suitable candlestick. Then the candle will burn cleanly and steadily.
Few things ruin the cosy atmosphere like a candle that gives off black smoke or drips stearin over the candlestick and tablecloth. Fortunately, this is almost always down to something you can easily fix. Here we go through the typical causes and the simple tricks that give you a clean, steady flame.
Trim the wick to
The most common cause of smoking candles is a wick that's too long. If the wick gets too long, the flame burns too fiercely and unevenly, causing soot and smoke. The solution is simple: trim the wick to about 5–7 mm before lighting it.
- Let the candle cool completely before trimming.
- Trim the wick to about 5–7 mm with scissors or a wick trimmer.
- Remove any trimmed bits from the wax so they don't burn along with it.
Tip: A black, smouldering flame or a large „mushroom“ at the end of the wick is a clear sign that the wick needs trimming.
Avoid draughts
Draughts are another major culprit. When air moves across the flame, it becomes unbalanced, flickers and burns unevenly – causing both smoke and uneven burning, so the candle drips on one side.
- Don't place candles in draughts from open windows, doors or ventilation.
- Keep your distance from fans and heat sources that create air movement.
- A calm, enclosed room gives the most stable flame.
The right candlestick and size
A candle burns best in a candlestick that matches its size. If a candle sits loosely or at an angle, it melts unevenly and drips more easily. Choose a candlestick where the candle stands straight and steady.
| Problem | Likely cause | Solution |
|---|---|---|
| The candle smokes | Wick too long or draught | Trim the wick, remove draughts |
| The candle drips | Draught or crooked placement | Stable candlestick with no draughts |
| Uneven burning | Wrong candle size | Choose a suitable candlestick |
| Fast burning | Draught and strong flame | Screen for draughts |
Quality: stearin vs paraffin
The quality of the light also matters. Candles are typically made from stearin (often plant-based) or paraffin. Well-made candles with a wick suited to the candle's diameter burn more steadily. Many candles are also sold as drip-free, making them better suited to candlesticks and festive tables.
Tip: Looking for candles that won't drip onto your fine tablecloth? Look out for the "drip-free" label when buying tealights and dinner candles.
Extinguish the candle properly
The way you extinguish your candle also matters. If you blow it out, you stir up smoke and melted wax, and the wick can carry on smouldering afterwards. Instead, use a candle snuffer, or gently dip the wick into the melted wax and lift it back up – that way you avoid both smoke and splashes.
Frequently asked questions
Why does my candle give off black smoke?
This is usually down to a wick that's too long, or a draught. Trim the wick to about 5–7 mm and place the candle somewhere free of air movement.
How long should the wick be?
A wick of around 5–7 mm typically gives a steady, clean flame. Always trim the wick when the candle is cold.
Why does my candle drip?
Dripping is often caused by a draught or an uneven position, making the candle melt unevenly. Use a stable holder away from draughts, and choose drip-free candles where possible.
Is it better to blow out a candle or use a candle snuffer?
A candle snuffer is best, as it helps you avoid smoke and splashes of melted wax. Blowing can stir up soot and cause the wick to smoulder.
Do expensive candles burn cleaner than cheap ones?
Not necessarily because of the price, but well-made candles with a wick suited to the diameter typically burn more steadily and cleanly.
Summary
Smoking and dripping candles are almost always down to a wick that's too long, a draught or an unsuitable holder. Trim the wick to 5–7 mm, keep the candle away from draughts, use a suitable candlestick and choose drip-free quality where possible. Extinguish with a candle snuffer, and you'll get a clean, steady flame every time.
Read also
- Candle guide: types, sizes and burn time
- How do you remove wax?
- When do you put candles in the window?
Take a look at our range of candles and find the perfect candlesticks to go with them.
