
Candle tunneling is a common issue that occurs when a candle burns unevenly, leaving a hole down the center and unused wax at the edges. This can be caused by various factors, such as an improperly sized wick, cheap wax composition, or drafty conditions. While preventing tunneling is ideal, there are several ways to fix a tunneled candle and restore its even burn. The time required for these fixes varies, ranging from quick solutions like using aluminum foil to reflect heat to the edges, to more time-intensive methods such as melting and resetting the wax. The chosen method depends on the severity of the tunneling and the tools available. This introduction sets the context for exploring the topic of how long does it take to fix a tunneled candle, as we will now delve into specific techniques and their respective time commitments.
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What You'll Learn

Using aluminium foil to reflect heat
Candle tunnelling occurs when wax creates a melt pool that is narrower than the candle itself. This happens when a candle is blown out before the wax has had a chance to melt from edge to edge. To fix this, you can use aluminium foil to reflect heat and create a more even melt.
Aluminium foil reflects radiant heat in the same way that it reflects light. This is why it is possible to use it to reflect heat from a wood stove into a room, rather than letting it heat a wall. When using foil to fix a tunnelled candle, you should wrap it around the top of the candle, leaving a small hole for the wick. This will create a heat barrier that will help melt the wax evenly.
The foil method is a temporary fix, and you should remove the foil after 15-20 minutes, or when the wax pool reaches the edge of the candle. You can then use a hairdryer to melt the wax around the candle's edges. You may need to tilt the candle to pour out excess wax. If the tunnelling is minor, you can skip the hairdryer and simply use a spoon to scoop out the excess wax.
It is important to note that foil cannot block conductive or convective heat transfer. The shiny side of the foil is also not significantly more effective at reflecting heat than the dull side. However, the shiny side is more effective at keeping heat out when the foil is wrapped with the shiny finish facing outwards.
To prevent candle tunnelling, you should ensure that your candle burns for at least two hours the first time you light it, and every time thereafter. You should also trim the wick to 5-6mm before lighting the candle, to help create a smaller, more even flame.
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Melting wax in the oven
To melt wax in the oven, first set the oven temperature to between 175 °F (79 °C) and 200 °F. Place the wax in an oven-proof container, such as a glass jar, and put it on a cookie sheet in the oven. The amount of time needed for the wax to melt depends on the amount of wax and the temperature setting, but it can take anywhere from 5 minutes to an hour. Keep a close eye on the wax as it melts, as the temperature will rapidly rise once it reaches a liquid state.
Once the wax has melted, use oven gloves to remove the container from the oven, being careful not to spill any hot wax. Turn off the oven, and allow the wax to cool before proceeding with your project.
It is worth noting that there are alternative methods to melting wax, such as using a microwave, double boiler, or slow cooker. These methods may be safer and more suitable for beginners.
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Using a candle topper
- Choose a candle topper that fits your candle jar: Candle toppers come in various sizes and designs. Make sure to select one that fits securely on top of your candle jar.
- Ventilation: Ensure that the candle topper has proper ventilation holes. These holes allow the candle to burn effectively while also stabilising the flame.
- Insulation: The candle topper acts as an insulator, trapping heat and distributing it evenly across the candle's surface. This helps to melt the wax uniformly, reducing the formation of tunnels.
- Draft protection: Candle toppers can also protect your candle from drafts. Drafts can cause uneven burning and contribute to tunneling. The topper creates a barrier that minimises the impact of drafts, promoting a more consistent burn.
- Burn time: Allow your candle to burn for an extended period with the candle topper in place. This helps the wax to melt evenly and reduces the appearance of tunnels. Aim for at least 3-4 hours, or follow the rule of one hour per inch of the candle's diameter.
- Aesthetics: Candle toppers come in various decorative designs. Choose a style that complements your candle and adds to its visual appeal.
By using a candle topper, you can effectively fix a tunneled candle, stabilise the flame, and promote even wax melting. Remember to follow candle safety guidelines and always supervise lit candles.
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Trimming the wick
The ideal length for a wick is about 1/4 inch, although this may vary depending on the type of candle and the kind of wick and wax used. For example, a candle with a thinner wick may require a shorter length, such as 1/8 inch. Trimming the wick to the appropriate length helps to control the size of the flame and prevent it from becoming too large, hot, and dangerous.
There are several tools that can be used to trim a wick. A wick trimmer, or "wick clipper," is specifically designed for this purpose and ensures a clean cut. Scissors can also be used, but it is important to trim the wick vertically and straight across, not at an angle. Nail clippers can be used in a pinch, but they may not provide as precise a cut as the other options.
By following these wick trimming guidelines, you can help ensure your candle burns evenly and avoid the formation of tunnels. A well-maintained wick will not only improve the appearance and longevity of your candle but also enhance its fragrance and overall burning experience.
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Scraping away excess wax
To fix a tunneled candle by scraping away excess wax, start by blowing out the candle and letting it cool. Take a butter knife and gently scrape away the unburned wax around the edges, being careful not to damage the wick or container. Place the excess wax into a separate container, such as a sealed baggie, to be used later or discarded.
If your wick is too short or buried in wax, you may need to replace it. You can purchase wicks from a local hobby store, but they may not be the correct size for your candle. To remove the old wick, use an apple corer to push through the wax around it, twist, and carefully pull upwards. If the wick is stuck at the bottom, use needle-nose pliers to remove it completely.
After removing the excess wax and ensuring the wick is the correct size, you can melt the remaining wax to create an even surface. This can be done by placing the candle in an oven set to 175 °F (79 °C) for 5 minutes, using a hair dryer on a medium setting, or melting the wax in a double boiler. Once the wax is melted, let it cool and solidify before relighting the candle.
To prevent tunneling in the future, ensure that your candle is lit long enough during its first few burns to create an initial layer of wax that reaches the edge of the container. Additionally, avoid drafty conditions that can cause uneven burning, and consider using a candle topper or multiple wicks to promote even melting.
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