Why Is My Candle Tunneling? Causes and Fixes for an Even Burn

Quick Answer

Candle tunneling happens when the wick is too small for the candle diameter or you don't burn it long enough on the first use. Fix it by allowing a full melt pool on the initial burn, trimming the wick to 1/4 inch, and choosing a candle with properly sized wicks. If tunneling persists, consider a candle with a larger wick or a different design.

You light a new candle, and after a few hours, you notice a deep well around the wick while the outer edges remain untouched. That's tunneling, and it wastes wax and shortens the life of your candle. It's a common frustration, but with the right techniques, you can prevent it and enjoy a clean, even burn.

In this guide, we'll explain why candles tunnel, how to fix it when it happens, and what to look for when buying candles to avoid the problem from the start. We'll also share how specific features of luxury candles can make a difference.

What Causes Candle Tunneling?

Tunneling occurs when the flame burns down the center of the candle without melting the wax at the edges. The most common cause is burning the candle for too short a time on the first light. If you extinguish it before the entire top layer melts, the candle 'remembers' that first burn and will continue to tunnel on subsequent uses.

Another culprit is a wick that's too small for the candle's diameter. A small flame doesn't generate enough heat to melt the wax outward. This is often a design flaw, especially in wider candles. Additionally, drafts or uneven wick trimming can cause the flame to burn unevenly, leading to tunneling.

• Always burn your candle long enough on the first use to create a full melt pool (usually 1 hour per inch of diameter).
• Keep the wick trimmed to about 1/4 inch to ensure a steady, appropriately sized flame.
• Avoid placing candles near drafts, which can cause uneven burning.

How to Fix a Tunneling Candle

If your candle has already tunneled, you can often correct it. Use a heat gun or hair dryer on low to gently melt the top layer of wax, allowing it to level out. Alternatively, wrap the candle in aluminum foil, leaving the wick exposed, and burn it for a few hours. The foil traps heat and helps melt the edges.

Another method is to carefully scoop out the excess wax from the tunneled sides and use a larger wick if possible. However, if the tunneling is severe or the wick is clearly too small, the most practical fix is to replace the candle. When buying new candles, look for ones with appropriately sized wicks for their diameter.

• Use aluminum foil to create a makeshift dome and encourage an even melt.
• Trim the wick before each burn to maintain a consistent flame.
• If the wick is too small, consider a candle with multiple wicks for better heat distribution.

Choosing Candles That Resist Tunneling

When shopping for candles, pay attention to the wick size relative to the container. A single-wick candle in a wide jar may struggle to melt the entire surface. Multi-wick candles distribute heat more evenly and are less prone to tunneling. Also, consider the wax type; softer waxes like soy tend to melt more easily.

Luxury candles often use high-quality wicks and carefully formulated wax to promote an even burn. For example, the 'Frederick' luxury candle from Harlem Candle Co. is a single-wick candle that, when burned correctly, delivers a consistent melt pool. For larger spaces, a two-wick option like the 'Gypsy' candle provides better heat coverage.

• Check the candle's diameter and wick count before purchasing.
• Read reviews to see if others mention tunneling issues.
• Follow the manufacturer's burn instructions for best results.

Diagnosis: Is Your Candle Tunneling?

• Symptom: You notice a deep well around the wick while the outer wax remains solid after burning for a few hours. This is the classic sign of tunneling.
• Likely Cause: The candle wasn't burned long enough on the first use, or the wick is too small for the candle's diameter. Check the wick size and your burn habits.
• Corrective Action: Use aluminum foil to trap heat, or a heat gun to level the wax. Trim the wick to 1/4 inch and burn until the entire surface melts. If the wax levels out, your candle is saved.
• Stop or Choose Another Option: If tunneling persists after multiple attempts, the wick is likely too small. Stop burning and consider replacing the candle with a multi-wick or properly sized option. For a reliable burn, choose a candle with two wicks, like the 'Gypsy' luxury candle.

Candle Facts That Matter

• Frederick Luxury Candle: Inspired by Frederick Douglass, this candle features a single wick and is infused with fruits and botanicals, re-imagining the orangerie. A single-wick candle requires proper first burn to avoid tunneling. The botanical blend offers a clean burn when maintained correctly.
• "Gypsy" Luxury Candle: This candle features two wicks and is inspired by the Broadway musical, opening with bergamot blossom and cinnamon. Two wicks provide more even heat distribution, reducing the risk of tunneling and helping the candle burn uniformly.

Tunneling is a common issue, but it's often preventable with proper burning habits and the right candle choice. By understanding the causes and applying these fixes, you can enjoy your luxury candles to the fullest. When in doubt, opt for candles with multiple wicks or a proven track record of even burns.