
Candles are a great way to create a cosy atmosphere, but they can be tricky to light and maintain. One of the most common issues is candle tunneling, which occurs when a candle burns downwards instead of outwards, creating a tunnel in the wax. This can be caused by various factors, such as an incorrectly sized wick, a draft, or failing to melt the top layer of wax evenly during the first burn. To prevent tunneling, it is recommended to trim the wick, burn the candle for a sufficient amount of time during the first burn, and ensure even melting across the top surface. Additionally, tools like long lighters, matches, or aluminum foil can be used to light candles in jars or fix existing tunneling issues. With proper care and techniques, you can maximise the lifespan and enjoyment of your candles.
How to get a smooth top on a candle
| Characteristics | Values |
|---|---|
| Wax type | Soy wax is recommended for a smooth, even finish |
| Temperature | The wax should be poured just before it starts to congeal, at around 60°C |
| Cooling | Control the cooling rate by pre-heating containers and placing candles in a cardboard box lined with tinfoil to cool slowly |
| Tools | Use a heat gun to re-melt the tops until smooth |
| Fragrance | Ensure fragrance oils are properly mixed |
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What You'll Learn
- Prevent candle tunneling by burning for a few hours until the top layer of wax has melted
- Fix tunneling by placing the candle in a larger vase or hurricane glass to insulate it
- Use aluminum foil to reflect heat back down to the candle's edge to melt the wax
- Trim the wick to prevent mushrooming and extend the life of the candle
- Use a long lighter or fireplace matches to light candles in jars

Prevent candle tunneling by burning for a few hours until the top layer of wax has melted
Candle tunneling is when a candle burns down its centre, leaving hard wax around the outside. This is usually caused by a first lighting that is too brief, resulting in a barrier that will remain on subsequent lightings. This is called a candle's "memory". To prevent tunneling, burn your candle long enough each time so that the entire top surface of wax is melted. This is especially important the first time you light your candle. A good rule of thumb is to burn your candle for one hour per inch of its diameter. For example, if your candle has a diameter of 3 inches, you should let it burn for 3 hours before putting it out.
If you forgot to let the wax pool reach the edge on the first burn, you can use a hair dryer on high heat to blast the top of the candle until the top layer of wax has melted and smoothed. If your candle is showing more serious signs of tunneling, you can use the foil method. Light your candle, then carefully wrap a layer of foil around the top, making a domed lip with a hole in the top. This will allow the heat to stay concentrated within the candle and melt the rim of hard wax on the sides. After about an hour, carefully remove the foil and you should have an even wax pool.
Another way to fix candle tunneling is to use a candle warmer, which will melt the wax and release the scent without the need for a flame. You can also try scooping out the unmelted wax with a spoon until it is the same height or lower than the middle part that melts, removing the "memory". When you light the candle, be sure to let it burn long enough for the pool of melted wax to reach the edge of the container.
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Fix tunneling by placing the candle in a larger vase or hurricane glass to insulate it
Candle tunneling is a common issue that occurs when a candle burns straight down the centre, leaving a ring of unused wax around the edges. This problem can drastically reduce the total burn time of a candle, as only a fraction of the wax is used up before the wick reaches the bottom.
To fix tunneling, one method is to place the candle in a larger vase or hurricane glass. This insulates the candle, protecting it from drafts which can cause uneven burning and contribute to tunneling. However, using a hurricane vase or tall cylinder can also rob the flame of oxygen, so caution must be taken.
Another way to insulate the candle and prevent tunneling is to use a candle topper, or "illuma-lid". These are specially designed lids that sit on top of jar candles, with holes for ventilation. They stabilise the flame and distribute it uniformly, preventing tunneling.
If you are unable to fix tunneling, there are still ways to enjoy the fragrance of the candle. You can place the candle on a candle warmer and melt the wax without lighting it, or scrape away the unused wax and place it in small portions on a tealight warmer.
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Use aluminum foil to reflect heat back down to the candle's edge to melt the wax
To fix candle tunnelling, you can use aluminium foil to reflect heat back to the candle's edge to melt the wax. This method may take a few tries to get right, and the foil will get hot, so be careful to let it cool before adjusting or removing it.
Firstly, extinguish the flame if it is lit. Then, wrap the candle with one or more sheets of foil, ensuring that the top extends over the unmelted wax while leaving the centre open for the flame. The foil should hang over any built-up wax areas, but there needs to be enough space in the centre for oxygen to reach the flame. The foil will trap the heat inside, melting the wax on the sides.
After 1-2 hours of burning, the candle's surface should even out, with a pool of melted wax reaching the edge of the container. You can then remove the foil.
This method is most effective with small candles, and may not work as well with larger candles.
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Trim the wick to prevent mushrooming and extend the life of the candle
Trimming the wick of a candle is an important step in candle care. Not only does it improve the candle's appearance and performance, but it also extends its life by preventing mushrooming.
Mushrooming occurs when there is an imbalance in the amount of wax and wick, leading to carbon buildup. This happens when the wick is too large for the candle's diameter, causing it to burn too hot and resulting in the formation of a "mushroom" shape at the end of the wick. To prevent this, ensure the wick is appropriately sized for the candle container.
Trimming the wick to a length of approximately 1/4 inch before lighting the candle is ideal. This helps maintain a healthy and consistent flame, preventing problems like black flames, tall flames, and excess smoke and soot. A properly trimmed wick will also ensure the wax is used efficiently, promoting an even and steady burn.
It is recommended to trim the wick before each use and to burn candles for no longer than four hours at a time. This helps to manage the amount of wax that is melted and prevents the wick from becoming too large, thus inhibiting mushrooming.
By following these simple steps of trimming the wick and managing burning times, you can prevent mushrooming and extend the life of your candle, ensuring an enjoyable and efficient candle experience.
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Use a long lighter or fireplace matches to light candles in jars
Lighting a candle in a jar can be tricky, especially if your hand doesn't fit in the mouth of the jar. Here are some tips to help you light a candle in a jar using a long lighter or fireplace matches:
Using a Long Lighter
If you're using a long lighter, such as a BBQ lighter, simply insert the tip of the lighter near the wick and press the trigger to ignite the candle. This type of lighter often has a long, flexible nozzle, making it easy to reach the wick. Hold the lighter at an angle so that it is adjacent to the wick.
To get more reach with a regular lighter, try holding it near the bottom with your thumb and middle finger. Then, use your index finger to reach up and strike the flint. Immediately press down on the lever to keep the flame going. Holding the lighter near the bottom will give you more reach and allow you to slip your fingers further into the jar.
Using Fireplace Matches
Fireplace matches are typically about 12 inches (30 cm) long, making them ideal for reaching into candle jars. To use a fireplace match, hold the match securely between your fingertips, leaving plenty of room for it to burn. Then, stretch your fingers into the jar until the match reaches the wick. Be careful not to hold the match upside down, as the flame could burn upward and singe your fingers.
If you don't have fireplace matches, you can try using two regular matches held together to create a longer reach. Hold the matches with your middle and ring fingers to lengthen them and strike the match. Then, quickly tuck the end of the match between your middle and ring fingers before stretching your fingers into the jar.
Alternative Methods
If you don't have a long lighter or fireplace matches, there are a few alternative methods you can try:
- Turn the candle upside down: Light the wick from below by holding a regular lighter or match underneath the candle. Be sure to flip the candle right-side-up as soon as the wick catches to avoid spilling wax.
- Use a taper candle: Light a taper candle and then use it to light the wick of the candle in the jar.
- Improvised tools: Try using a long, twisted piece of paper, an uncooked spaghetti noodle, or a Q-tip to extend your reach and light the wick.
Remember to always exercise caution when lighting candles, and ensure that your candle is on a heat-resistant surface and away from flammable objects.
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Frequently asked questions
To prevent candle tunneling, burn your candle for long enough each time so that the entire top surface of wax is melted. This is especially important the first time you burn your candle. A good rule of thumb is to burn your candle for one hour per inch of its diameter.
Candle tunneling is when only a small circle of wax melts around the wick while your candle is burning, instead of across the entire surface of the candle. It usually means some wax is wasted, and over time, it can become impossible to light the wick.
There are a few ways to fix candle tunneling. One way is to use aluminum foil to reflect heat back down to the candle's edge to aid in melting the wax. Another way is to scoop out the unmelted wax with a spoon until it is the same height or lower than the middle part that melts, thereby removing the "memory."
Lighting a candle in a jar can be tricky once the candle burns down a little, especially if your hand doesn't fit in the mouth of the jar. Fireplace matches, BBQ lighters, and taper candles can help you reach the wick.











































