How to Fix Candle Tunnelling (Simple Tips That Actually Work)
Have you ever lit a candle and noticed it burning straight down the middle, leaving thick wax stuck to the sides? That’s called candle tunnelling and it’s one of the most common problems people face with scented candles.
The good news? Candle tunnelling is easy to fix and even easier to prevent. This guide uses quick steps, and practical tips so you can enjoy your candle fully.
What Is Candle Tunnelling?
Candle tunnelling happens when:
The candle burns only in the centre
Wax builds up around the edges
The candle looks like a “tunnel” has formed
This means:
Your candle won’t last as long
Fragrance won’t spread properly
You’re not getting full value from your candle
Many people search for this as:
Why is my candle tunnelling?
Candle burning only in the middle
Candle not melting evenly
Why Do Candles Tunnel?
Candle tunnelling usually happens because of how the candle is burned, not because the candle is bad.
Common reasons for candle tunnelling:
The candle wasn’t burned long enough the first time
The wick is too short or too long
The candle is blown out too quickly
The candle is kept near a fan or AC
How to Fix Candle Tunnelling (Step-by-Step)
1. Let the Candle Burn Longer
The easiest fix is also the most effective.
Light your candle and let it burn until:
The entire top layer of wax melts evenly
The melted wax reaches the edges of the jar
This can take:
1–1.5 hours for small candles
2–3 hours for medium or large candles
⚠️ Don’t blow out the candle too early.
2. Use the Foil Method (Quick Fix)
If tunnelling has already started, try this:
Wrap aluminium foil around the top of the candle
Leave a small opening in the centre for the flame
Light the candle and let it burn for 1–2 hours
The foil traps heat and helps melt the wax evenly.
This is one of the most searched fixes for:
How to fix candle tunnelling
Candle wax not melting on sides
3. Trim the Wick Before Lighting
Before each burn:
Trim the wick to ¼ inch (5–6 mm)
This helps:
Control the flame
Prevent uneven burning
Reduce smoke and soot
A badly trimmed wick can make tunnelling worse.
4. Keep the Candle Away from Airflow
Drafts affect how a candle burns.
Avoid placing candles near:
Fans
AC vents
Open windows
Air movement causes the flame to flicker and melt wax unevenly.
