How to Fix a Tunneling Candle: Causes and Solutions for an Even Burn

Quick Answer

Tunneling happens when a candle burns too briefly or the wick is too small, leaving wax on the sides. Fix it by letting the candle burn long enough to melt the entire surface, trimming the wick, or using foil to even out the melt pool. For severe cases, consider a candle warmer.

There's nothing more frustrating than lighting a new candle and watching it burn a hole straight down the middle, leaving thick walls of wax behind. That's tunneling, and it's one of the most common candle problems. The good news: it's often fixable, and with a few simple habits, you can prevent it from happening in the first place.

In this guide, we'll walk you through what causes tunneling, how to fix it at different stages, and how to ensure your Boy Smells candles burn evenly from the first light to the last flicker.

What Causes Candle Tunneling?

Tunneling occurs when the flame only melts a small circle around the wick, leaving the outer wax solid. The most common cause is not burning the candle long enough on the first use. If you extinguish it before the entire top layer has melted, the candle 'remembers' that burn pattern and continues to tunnel on subsequent burns.

Other factors include a wick that's too small for the candle diameter, drafts that cause uneven burning, and low-quality wax with a low melting point. Some candles, especially those in jars with thick walls, naturally need more time to reach the edges.

• Always burn your candle long enough for the entire surface to melt on the first burn—this can take 2-4 hours depending on the candle size.
• Keep the wick trimmed to about 1/4 inch (6 mm) before each burn to promote a steady flame.
• Avoid burning candles in drafty areas, as drafts can cause uneven melting.

How to Fix a Tunneling Candle: Step-by-Step

If you're already dealing with tunneling, don't toss the candle. Start by using a heat gun or hairdryer on low heat to gently melt the top layer of wax, allowing it to pool evenly. Alternatively, you can use the foil method: wrap aluminum foil around the rim of the jar, leaving a small opening for the wick, and light the candle. The foil traps heat and helps melt the edges.

For tunnels that are deep, you might need to scoop out some of the excess wax with a spoon once it's slightly cooled, then burn again. If the wick is too short to light, you can melt a small well with a lighter or use a wick dipper to expose more wick. In severe cases, consider using the candle on a warmer instead of burning it.

• Foil method: wrap foil around the rim, leave a small hole for the wick, and burn for 1-2 hours until the surface melts.
• Use a hairdryer on low heat to soften the top wax, then level it with a spoon.
• If the wick is buried, melt a small well with a lighter to expose it.

Preventing Tunneling in the Future

The best way to avoid tunneling is to establish a good burn routine from the start. Always allow your candle to burn until the entire top layer is liquid—this can take up to 3 hours for larger candles. Never burn for less than an hour, and extinguish after 4 hours max to prevent soot.

Also, trim the wick to 1/4 inch each time, and keep the candle away from drafts. If you're using a candle with a wooden wick, you may need to trim it to 1/8 inch. Consistency is key: follow these steps every time, and you'll enjoy an even burn down to the last bit of wax.

• First burn: allow 2-3 hours for the melt pool to reach the edges.
• Trim wick to 1/4 inch before each lighting.
• Keep away from fans, open windows, and air conditioning vents.

Diagnosing Your Candle Tunneling

• Symptom: Wax builds up on the sides while the center burns down, creating a tunnel shape. You have tunneling.
• Likely Cause: The candle wasn't burned long enough initially, the wick is too small, or the candle is in a draft. Identify the cause to choose the right fix.
• Corrective Action: Use the foil method or heat gun to melt the top layer, then burn for 2-3 hours until the surface is even. If the tunnel is less than 1/2 inch deep, this should work.
• Stop or Choose Another Option: If the wick is too short to light or the tunnel is very deep, consider using a candle warmer or repurposing the wax. When burning is no longer safe, switch to a warmer or craft project.

Boy Smells Candle Care

• COCO HINOKI: This 8.5 oz candle from the core collection features hinoki as a key note, evoking calm and natural warmth. With a larger 8.5 oz size, it's important to give this candle a long first burn to avoid tunneling and enjoy its full scent throw.
• ASH: ASH is an 8.5 oz limited edition candle with earthy, smoky, and woody notes. Limited edition candles deserve extra care; following proper burn practices ensures you get the most out of this special scent.

Tunneling doesn't have to ruin your candle experience. With a little patience and the right techniques, you can fix most tunneling issues and enjoy an even, long-lasting burn. Remember to give your Boy Smells candles a proper first burn and maintain them well—it's the secret to getting the most out of every scent.