Chloe Adams
Candle tunnelling is a common issue that occurs when only the centre of the wax melts, leaving a thick ring of unmelted wax around the edges. This not only wastes your candle but also shortens its lifespan. Luckily, there are several ways to prevent and fix candle tunnelling. Firstly, it is important to note that candle tunnelling is more likely to occur in cheap candles compared to higher-quality luxury candles. However, any candle can tunnel without using the right care techniques.
How to stop a candle from tunnelling
| Characteristics | Values |
|---|---|
| First burn duration | Burn for at least 1 hour or until the entire top layer of wax has melted |
| Wick size | Trim the wick to 1/4 inch before each burn |
| Wick centering | Ensure the wick is centered |
| Candle type | Three-wick candles tend to burn better and avoid tunnelling |
| Candle topper | Use a candle topper, especially for larger candles with a single wick |
| Candle warmer | Use a candle warmer to heat the wax from below |
| Heat gun/hairdryer | Use a heat gun or hairdryer to melt the wax evenly |
| Foil | Wrap the candle in foil to reflect heat back to the candle's edge |
| Oven | Place the candle in an oven at a low temperature to melt the wax |
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What You'll Learn
Ensure the first burn is long enough
Candle tunnelling is a common issue that occurs when only the centre of the wax melts, leaving a thick ring of unmelted wax around the edges. This phenomenon can be prevented by ensuring that the candle burns long enough during its first use to create a full melt pool that reaches the edges of the container. This usually takes at least an hour or two, depending on the size of the candle. If you blow out the candle too early, the wax in the centre will cool and solidify, becoming “softer” than the surrounding wax. As a result, the next time you light the candle, only the centre portion will melt, creating a tunnel.
To avoid tunnelling, it is recommended to let the candle burn for approximately one hour per inch in diameter. This ensures that the entire top layer of wax has melted and creates a memory for the candle, preventing tunnelling in future burns. It is important to note that this initial long burn only applies to the first time you light a new candle.
If you notice tunnelling, you can try to fix it by using a hairdryer to melt the wax evenly or wrapping tin foil around the candle to concentrate the heat and help melt the outermost wax. However, preventing tunnelling during the first burn is the most effective method.
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Trim the wick
Trimming the wick of a candle is an important step in preventing tunnelling. It is recommended that the wick be trimmed to 1/4 inch before each burn to ensure a steady and even flame. This enables a cleaner, more consistent burn. A candle wick trimmer can be used to achieve the optimal length. Trimming the wick helps to prevent the formation of a "memory" in the wax, where the wax closest to the wick melts more easily than the outer wax, creating an uneven melt pool.
In addition to wick trimming, it is crucial to allow the candle to burn for a sufficient duration during its initial use. This means letting the candle burn until the entire top layer of wax has melted, creating a full melt pool that reaches the edges of the container. The rule of thumb is to burn the candle for one hour per inch of diameter. This initial burn helps to prevent tunnelling by ensuring that the wax melts evenly across the surface.
If tunnelling has already occurred, trimming the wick is still an important step in rectifying the issue. After trimming, use a hairdryer on a low setting to gently heat the top surface of the candle. This helps to melt the wax evenly and remove the "memory" caused by previous uneven melting. Once the wax has smoothed over, relight the candle and allow it to burn for at least 30 minutes or until the tunnelling is no longer visible.
To summarise, trimming the wick is a crucial step in preventing and correcting candle tunnelling. It is important to maintain a consistent wick length before each burn and to combine this practice with proper burning techniques, such as allowing for a sufficient initial burn duration. By following these steps, you can help ensure an even melt pool and maximise the lifespan of your candle.
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Melt wax with a hairdryer
If you're working with a small tunnel, a hairdryer can be a good option to even out the surface of the wax. This method can also be used to fix minor tunnelling issues.
Firstly, ensure the candle is extinguished. Then, use a hairdryer to gently melt the wax to the edge of the container. It is recommended to use a low setting and hold the hairdryer far enough away to avoid spattering any wax. You may need to do this for some time, as hairdryers do not get extremely hot.
Once the wax has melted evenly, you can use a spoon to smooth out the surface. Then, light your candle and let it burn for a while to reset the wax memory.
If you are concerned about wax spattering, you can cover the candle with aluminium foil, leaving a small opening for the wick and flame. This will also help to increase the heat and melt the wax.
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Use aluminium foil
If you want to stop your candle from tunnelling, you can use aluminium foil to fix it. This is a popular trick among candle enthusiasts.
Firstly, you need to ensure that the candle is not burning. Then, take a piece of aluminium foil and wrap it around the outside edge of the candle, making sure that the foil reaches over the tunneled wax. The foil should hang over any wax build-up areas, but it is important to leave an opening in the centre so that the wick can continue to burn properly. The flame needs oxygen to burn, so the opening should be large enough to allow plenty of oxygen in.
The aluminium foil increases the heat while keeping the vessel insulated, causing the excess wax to melt. After a couple of hours, the wax should melt and even out the surface, and you can remove the foil.
It is important to note that the quality of the wax and the shape of the container might affect how well the foil hack works. For larger candles, make sure the flame can still burn strongly and create enough heat to melt the wax.
To prevent candle tunnelling in the first place, consider buying candles with multiple wicks and letting them burn for several hours the first time you light them.
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Store candles properly
Storing candles properly is essential to prevent candle tunnelling and ensure they burn evenly. Here are some tips to help you store your candles correctly:
Firstly, always store candles in a cool, dry place away from direct sunlight. Sunlight can cause the wax to melt or soften, leading to uneven burning. Keeping them in a dry place prevents moisture build-up, which can also affect the wax's consistency and burning behaviour.
Secondly, ensure the storage area is dust-free. Dust and other airborne particles can settle on the wax, potentially causing wick issues or uneven melting. Store candles in a clean, enclosed space, such as a cabinet or drawer, to protect them from dust accumulation.
Another critical factor is maintaining a consistent storage temperature. Avoid placing candles near heat sources like radiators or ovens. Extreme temperature fluctuations can impact the wax's integrity, making it more prone to tunnelling.
In addition, consider using airtight storage containers. This is especially beneficial if you live in an area with high humidity. Airtight containers help regulate moisture levels and keep your candles in optimal condition.
Lastly, avoid stacking candles directly on top of each other. This can cause deformation, affecting the way the wax melts. Instead, place them side by side or use dividers to separate each candle, ensuring they retain their shape.
By following these storage tips, you'll help prevent candle tunnelling and maintain the quality and longevity of your candles.
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Frequently asked questions
To prevent tunnelling, ensure the candle burns long enough during its first use to create a full melt pool that reaches the edges of the container. This usually takes 1-2 hours, depending on the size of the candle.
There are a few ways to fix a candle that has tunnelled. One way is to wrap aluminium foil around the candle's base and upper edge, leaving an opening at the top for the flame to burn safely. Another way is to place the candle on a baking tray and put it in the oven for about 5-10 minutes to melt the wax evenly.
Candles tunnel when only the centre of the wax melts, leaving a thick ring of unmelted wax around the edges. This happens when the wax pool does not reach the edge of the container during the first burn, creating a "memory" barrier that remains during subsequent burns.
