What Is Candle Tunneling?
Candle tunneling occurs when only the wax at the center of a candle, directly around the wick, melts and burns down, leaving a ring of hardened, unused wax around the perimeter. Over time, this uneven melting causes a tunnel-like hole through the candle—hence the name. This not only looks unsightly but also drastically reduces the candle’s usable life and fragrance, as much of the wax never gets a chance to evaporate.
Why does this happen? It most often results from not letting the wax melt fully to the edges during the candle’s first few burns or from using a wick that’s too small for the candle’s diameter. A proper, full-width melt pool is crucial for an even burn.
How to Fix Candle Tunneling: The Aluminum Foil Method
If your favorite candle is tunneling, don’t worry—there’s a simple fix using basic household aluminum foil. Here’s a straightforward, step-by-step guide:
Step 1: Light the Candle
Begin by lighting your candle as usual. Allow it to burn for a few minutes until a small wax pool forms around the wick.
Step 2: Grab Some Aluminum Foil
Tear off a piece of aluminum foil, making sure it’s large enough to wrap around the top rim of your candle.
Step 3: Wrap Your Candle in the Foil
Carefully wrap the foil around the top edge and sides of the candle, forming a dome or tent shape. Leave an opening at the top to allow air to escape and ensure the flame gets oxygen. The foil should cover the outer ring of unmelted wax, but not block the wick or flame.
Step 4: Let the Candle Burn
Allow the candle to continue burning for 1–2 hours. The foil traps heat around the edges, causing the stubborn wax to melt evenly toward the rim. Check occasionally to make sure everything looks safe and the foil hasn’t slipped.
Step 5: Remove the Foil
After the wax has melted all the way to the rim of the jar and the top surface is smooth, carefully remove the foil (it may be hot, use caution!). Blow out the candle if you need to reshape the wick or want to admire your handiwork.
Step 6: Admire the Smooth Wax Surface
Congratulations! Your candle’s surface should now be even and smooth. The candle is effectively “reset,” so the next time you light it, the wax should burn evenly and the candle will last longer.
Candle tunneling is a common issue, but it’s easy to fix and even easier to prevent by burning your candle long enough for the entire surface to melt on the very first use. If tunneling happens, the aluminum foil trick can bring new life to your favorite candles and help you enjoy every last drop of fragrant wax.
