Why Is My Candle Tunnelling? 7 Common Candle Problems Explained
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Why Is My Candle Tunnelling? 7 Common Candle Problems Explained
You’ve lit your new candle, enjoyed the fragrance and watched the wax melt.
Then you notice something isn’t quite right.
The wax has melted around the wick, but a thick ring of unmelted wax remains around the outside of the jar.
This is known as candle tunnelling.
It’s one of the most common candle problems, and fortunately, it’s usually preventable.
In this guide, we’ll explain why candle tunnelling happens, how to prevent it and what you can do if your candle has already started to tunnel.
What Is Candle Tunnelling?
Candle tunnelling happens when the wax directly around the wick melts, but the wax further towards the edge of the container doesn’t.
Instead of creating an even melt pool across the surface of the candle, the candle burns downwards in a narrow tunnel.
If left untreated, this can mean you’re left with a significant amount of unused wax around the sides of the jar.
The good news?
Your candle usually isn’t faulty.
In many cases, tunnelling is caused by how the candle is burned, particularly during its first few burns.
1. The First Burn Is Extremely Important
One of the biggest mistakes people make with a new candle is burning it for only a short period of time.
For example:
Light candle → burn for 30 minutes → blow it out.
The wick creates a melt pool around itself, but the outer wax doesn’t have enough time to melt.
If this happens repeatedly, the candle can effectively “remember” that smaller melt pool and continue burning downwards.
Give the first burn time.
Ideally, allow the melt pool to develop across most of the surface of the candle before extinguishing it.
For larger candles, this can take considerably longer than a quick evening burn.
2. Don’t Burn Your Candle for Too Little Time
Short burns are one of the biggest causes of tunnelling.
If you’re constantly burning your candle for 20–30 minutes and then extinguishing it, you’re not giving the wax enough time to heat evenly.
Instead, aim to burn your candle for long enough to establish a healthy melt pool.
However, don’t leave a candle burning indefinitely.
Always follow the safety instructions supplied with your candle.
3. Don’t Burn Your Candle for Too Long Either
It might seem logical that if a short burn causes tunnelling, a very long burn must be better.
Not necessarily.
Candles should never be left burning unattended or for excessive periods.
Long burns can cause the container to become excessively hot and can affect the performance of the wick.
The goal is a controlled, even burn.
4. Trim Your Wick Before Burning
Wick maintenance is an important part of candle care.
Before lighting your candle, allow it to cool completely and then trim the wick to the recommended length.
For a wooden wick, keeping the wick trimmed helps maintain a controlled flame.
A wick that’s too long can produce a larger flame, more smoke and excessive heat.
A wick that’s too short may struggle to maintain a consistent flame.
With Ember & Oak wooden wicks
We recommend keeping the wick trimmed to approximately 5mm before each burn.
Always remove loose pieces of charred wick before relighting.
5. Why Do Wooden Wick Candles Sometimes Behave Differently?
Wooden wicks aren’t identical to traditional cotton wicks.
They’re designed to provide a distinctive flame and, importantly, the gentle crackling sound that makes them such an enjoyable part of the candle experience.
Because they’re different from cotton wicks, their flame can sometimes appear smaller or behave differently.
That’s not necessarily a problem.
A healthy wooden wick should produce a controlled flame while gradually creating an even melt pool.
Keeping the wick properly trimmed is particularly important.
6. What If My Candle Has Already Started Tunnelling?
Don’t panic.
If there’s still plenty of wax remaining, you may be able to encourage the candle to catch up.
Try this:
Allow the candle to burn for a controlled period while keeping a close eye on it.
As the melt pool expands, more of the surrounding wax should begin to melt.
For mild tunnelling, several properly managed burns may gradually improve the appearance.
For significant tunnelling
A candle that has developed a deep tunnel may require more careful intervention.
Don’t try to force the wax to melt by creating an excessively large flame or leaving the candle burning unattended.
If you’re unsure, contact the candle manufacturer for advice.
7. Candle Tunnelling Isn’t Always Your Fault
Although burning habits are a major factor, candle performance can also be affected by the candle itself.
Things such as:
- Wick size
- Wick type
- Wax blend
- Fragrance load
- Container diameter
- Fragrance composition
- Environmental conditions
can all influence how a candle burns.
That’s why professional candle makers spend so much time testing different combinations of wax, fragrance and wick.
A candle isn’t simply wax + fragrance + wick.
The entire combination has to work together.
How To Get the Best Burn From Your Ember & Oak Candle
To get the most from your Ember & Oak candle:
Before lighting
Trim the wooden wick to approximately 5mm.
Remove any loose debris from the previous burn.
During the burn
Place your candle on a stable, heat-resistant surface.
Keep it away from draughts, children, pets and anything that could catch fire.
Allow the wax to melt evenly without leaving the candle unattended.
After burning
Extinguish the candle safely and allow the wax and container to cool completely before moving it.
Before the next burn, trim the wick again.
How Long Should You Burn a Candle?
There’s no single perfect burn time for every candle because container size, wax, wick and fragrance all affect performance.
Instead of focusing solely on a specific number of hours, pay attention to the melt pool and the manufacturer’s recommended maximum burn time.
You want the candle to burn evenly without allowing the container to become excessively hot.
And remember:
Never leave a burning candle unattended.
Why Candle Care Matters
Looking after your candle properly doesn’t just make it look better.
It can help you:
- Get a more even burn
- Reduce wasted wax
- Maintain better wick performance
- Enjoy your fragrance for longer
- Get more value from your candle
- Enjoy the crackling wooden wick safely
A few seconds of wick maintenance before each burn can make a big difference.
The Ember & Oak Difference
At Ember & Oak, our candles are designed around the complete fragrance experience.
We use a coconut soy wax blend and crackling wooden wicks to create candles that combine fragrance with the atmosphere of a real fire.
But even a well-tested candle needs to be cared for correctly.
The way you burn your candle matters.
Give it the right conditions, look after the wick and allow the wax to burn properly, and you’ll get a much better experience from your candle.
Final Thoughts
If your candle is tunnelling, don’t immediately assume something is wrong with it.
In many cases, the problem comes down to burning habits, particularly short initial burns and insufficient wick maintenance.
Give your candle time to establish an even melt pool, keep the wick trimmed and always follow the manufacturer’s safety instructions.
And if you’re ever unsure about how your Ember & Oak candle should be burning, get in touch with us.
We’re always happy to help.
Visit our Candle Care Page Here
Ember & Oak — Scents of Distinction.
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