How to Fix Candle Tunneling: A Step-by-Step Guide

Quick Answer

To fix candle tunneling, trim the wick to 1/4 inch, light the candle and let it burn until the entire top layer melts, then extinguish and allow it to cool. If tunneling is severe, use the foil method to trap heat and even out the burn. Always follow proper first-burn practices to prevent tunneling in the future.

Candle tunneling is a common issue where the wax burns down the center, leaving a thick rim of unmelted wax along the sides. This not only wastes wax but also shortens the candle's lifespan. If you've noticed a tunnel forming in your favorite soy candle, don't worry—it's fixable with a few simple steps.

In this guide, we'll walk you through how to fix candle tunneling, explain why it happens, and share tips to prevent it from recurring. Whether you're new to candle care or a seasoned enthusiast, these practical steps will help you get the most out of your candles.

Why Does Candle Tunneling Happen?

Tunneling occurs when the candle burns too briefly, not allowing the entire top layer of wax to melt. This is especially common with large-diameter candles or those with multiple wicks. When you extinguish the candle before the melt pool reaches the edges, the wax hardens unevenly, creating a tunnel that deepens with each subsequent burn.

Another cause is a wick that is too short or trimmed too close to the wax surface. A short wick produces a smaller flame, which generates less heat and cannot melt the full diameter of the candle. Additionally, drafts can cause uneven burning, as one side of the flame may be cooler.

Soy wax, while eco-friendly and clean-burning, can be more prone to tunneling if not burned correctly. However, with proper care, soy candles like those from KOBO can burn evenly and last longer.

• Always allow the first burn to create a full melt pool across the entire surface.
• Keep wicks trimmed to 1/4 inch before each burn.
• Avoid burning candles in drafty areas.

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

If your candle has already developed a tunnel, you can fix it with a few simple methods. The goal is to melt the excess wax on the sides and create an even surface. Here are the most effective techniques:

Start by trimming the wick to 1/4 inch. This ensures a steady flame. Then, light the candle and let it burn for at least two hours, or until the melt pool reaches the edges. If the tunnel is deep, you may need to use the foil method to trap heat and speed up the process.

• Use a candle snuffer or blow out gently to avoid splattering.
• Never leave a burning candle unattended.

The Foil Method: A Quick Fix

The foil method is a popular way to fix severe tunneling. Wrap a piece of aluminum foil around the top of the candle, leaving a small opening for the wick. This traps heat and reflects it back onto the wax, melting the edges more quickly.

Light the candle and monitor it for 30-45 minutes. The trapped heat will soften the wax on the sides, allowing it to melt into the pool. Once the entire surface is liquid, remove the foil and extinguish the candle. Let it cool and solidify before the next burn.

• Be cautious when handling hot foil—use tongs or gloves.
• Do not leave the candle unattended while using the foil method.

Preventing Tunneling in the Future

Prevention is better than cure. To avoid tunneling, always burn your candle long enough for the entire top layer to melt. This usually takes 1-2 hours for standard candles, but larger candles may need more time. Also, trim the wick before every burn to maintain a consistent flame.

Consider using a candle topper or snuffer to extinguish the flame without smoking. And store candles away from direct sunlight and heat sources to prevent warping.

• For multi-wick candles, ensure all wicks are lit to create an even melt pool.
• If you notice tunneling starting, correct it immediately with a longer burn.

Step-by-Step: Fix Candle Tunneling

1. Trim the wick: Before lighting, trim the wick to 1/4 inch using a wick trimmer or scissors. This ensures a consistent flame size. Check: The wick should be straight and free of debris.
2. Light and burn: Light the candle and allow it to burn for 1-2 hours, or until the entire top layer of wax is melted. Do not extinguish early. Check: The melt pool should reach the edges of the container.
3. Extinguish and cool: Use a snuffer or blow out gently. Let the candle cool completely before relighting. Check: The surface should be smooth and even after cooling.
4. Use the foil method if needed: For deep tunnels, wrap aluminum foil around the top, leaving a small hole for the wick. Burn for 30-45 minutes until the wax melts evenly. Check: The wax should be liquid across the entire surface.
5. Prevent recurrence: Always follow the first-burn rule: burn long enough for a full melt pool on the first use. Trim the wick before each burn. Check: Your candle should burn evenly every time.

Products That Help with Even Burning

• Brave Spaces Limited Edition 11 oz Pure Soy Pride Candle: This fragrance bubbles over with bright citrus top notes of refreshing lemon, grapefruit and yuzu. These fruity scents intertwine with nutmeg and eucalyptus to add an earthy and grounded element. The main body of this fragrance is a fresh floral jasmine, with rose accord and iris. With an amber musk and treemoss base. A well-crafted soy candle like this one, with a consistent wax blend and properly sized wick, is less likely to tunnel when burned correctly. Its 11 oz size allows for a longer burn time, giving you ample opportunity to establish a full melt pool.
• Endless Summer Plant the Box Votive Candle Trio: Our best-selling Plant The Box candles are now available as votive trio sets! Enjoy an endless summer with three of our most popular scents inspired by the lush greenery, florals and herbs that surrounds us each summer. Split up the set for easy gifting or place each candle in a different area of your space. Each votive candle has a 15-hour burn time. Votive candles have a smaller diameter, making them less prone to tunneling. With a 15-hour burn time per candle, you have plenty of time to practice proper burning techniques. The trio set is perfect for testing different scents while honing your candle care skills.

Fixing candle tunneling is simple with the right techniques. By following these steps and practicing proper candle care, you can enjoy a longer-lasting, more even burn from your soy candles. Remember to always trim your wick, allow full melt pools, and use the foil method for stubborn tunnels. With a little attention, your candles will burn beautifully from start to finish.