What Are Wet Spots?
Those patches where the wax has pulled away from the glass, creating a cloudy or uneven appearance. They're called "wet spots" because they look like moisture trapped between wax and glass.
They're not actually wet. It's just an air gap.
Do They Matter?
Honestly? Not for burn quality. A candle with wet spots burns exactly the same as one without.
They're purely cosmetic. Some makers obsess over them. Others accept them as part of working with natural wax.
Why They Happen
Temperature Changes
Wax expands and contracts as it heats and cools. If it cools too quickly or unevenly, it pulls away from the glass.
Cold Containers
Pouring into a cold jar is the number one cause. The wax sets instantly on contact with cold glass - before it can bond properly.
Wrong Pour Temperature
Too hot: wax contracts significantly as it cools, pulling away.
Too cold: wax sets before it bonds.
Environmental Factors
Drafts, air conditioning, temperature fluctuations in your workspace - all contribute to uneven cooling.
How to Minimise Them
1. Warm Your Containers
Pre-heat jars to about 50°C. A low oven, heat gun, or just leaving them near your melting pot works. Warm glass = better adhesion.
2. Pour at the Right Temperature
For most soy/coconut blends: 55-65°C. Check your specific wax's datasheet.
3. Cool Slowly
No fans. No fridges. No windowsills. Room temperature, away from drafts. Let them cool for at least 4-6 hours.
4. Consider Your Environment
Make candles in a room with stable temperature. Avoid cold workshops in winter.
The Nuclear Option
Some makers use a heat gun around the outside of the jar after the candle sets. This re-melts the outer layer and improves adhesion.
It works, but adds time to every candle. Decide if it's worth it for your brand.
Accept Some Imperfection
Natural waxes are more prone to wet spots than paraffin. It's part of the trade-off for using sustainable materials.
Many customers don't even notice. Those who do often appreciate that it's a sign of natural wax.