What Is Frosting on Soy Wax Melts? Why It Happens & Why It’s Completely Normal
Have you ever picked up one of your favourite soy wax melts and noticed a few white patches, a slightly cloudy appearance or a frosted, crystalline effect on the surface?
Don’t worry – your wax melts haven’t gone bad!
This is known as soy wax frosting, and it’s a completely natural characteristic of soy wax. It can appear shortly after a wax melt has been made or develop over time, and changes in temperature can make it more noticeable.
As I handmake my soy wax melts here at Precious Wax Sanctuary, I thought it would be helpful to explain exactly what frosting is, why it happens and, most importantly, why it doesn’t affect how beautifully your wax melts perform.
What Is Frosting on Soy Wax?
Frosting is the name given to the white, cloudy or crystalline markings that can sometimes appear on soy wax.
You might notice:
- Small white patches on the surface
- A frosted or cloudy appearance
- Fine crystal-like markings
- Lighter patches around the edges of a wax melt
- Changes in the appearance of coloured wax
Sometimes it can be very subtle, while other times it can be much more noticeable.
Although it may look unusual if you haven’t seen it before, frosting is not mould, damage or a sign that your wax melt has gone off.
It is simply part of the natural behaviour of soy wax.
Why Does Soy Wax Frost?
Soy wax is made from soybean oil and has a natural crystalline structure. As the wax cools, sets and changes over time, tiny crystals can form within the wax.
These crystals can become visible on the surface, creating the effect we call frosting.
Because soy wax is a natural product, it doesn’t always remain perfectly smooth and uniform in appearance. Even when wax melts are made using the same wax, fragrance and process, one batch may develop more visible frosting than another.
It is one of the little quirks that comes with using soy wax.
Does Hot Weather Cause Soy Wax Frosting?
Temperature can play a big part in how noticeable frosting becomes.
During warmer weather, wax melts can naturally become warmer during storage or while travelling through the postal system. They may then cool again when the temperature drops.
These changes between warmer and cooler temperatures can affect the crystalline structure of soy wax and may make frosting more noticeable.
This is one of the reasons you might suddenly notice white or cloudy areas on a wax melt that previously looked completely smooth.
Can Cold Weather Cause Frosting Too?
Yes! Frosting isn't only something that happens during the summer.
Cold temperatures and sudden temperature changes can also encourage frosting to become more visible.
For example, a parcel may spend time in a cold delivery van during winter before being brought into a warm home. That change in temperature can affect the appearance of natural soy wax.
This means frosting can happen at any time of year, particularly when wax melts experience changes in temperature.
Does Frosting Affect the Scent of Wax Melts?
No.
Frosting is an appearance change and does not mean your wax melt has lost its fragrance.
A frosted wax melt can still fill your home with fragrance just as beautifully as one with a perfectly smooth appearance.
The fragrance is still within the wax, and the frosting itself doesn't mean anything has happened to the scent.
So if you open your wax melt box and spot a little frosting, you can still pop your chosen melt into your burner and enjoy it as normal.
Does Frosting Affect How a Wax Melt Performs?
Again, no.
Frosting does not stop the wax from melting correctly and does not mean there is anything wrong with the product.
Once placed in a suitable wax melt burner, your soy wax melt will melt into a liquid wax pool as usual and release its fragrance into your home.
Frosting is purely cosmetic.
Why Do Some Wax Melts Frost More Than Others?
This is another completely normal part of working with soy wax.
You may find that one wax melt develops quite noticeable frosting while another looks almost exactly the same as the day it was made.
Several factors can influence the appearance of soy wax, including temperature, cooling conditions, storage and the fragrance or colour used in the wax.
Frosting can also develop gradually, so a wax melt that looks perfectly smooth when it arrives may develop some frosting later.
That's one of the reasons the appearance of handmade soy wax products can naturally vary.
Are White Patches on Soy Wax Melts Mould?
This is an understandable concern, particularly if you've never seen soy wax frosting before.
However, the white or crystalline patches commonly seen on soy wax melts are generally frosting rather than mould.
Frosting tends to look like pale, cloudy or crystal-like areas within or across the surface of the wax.
If you've purchased handmade soy wax melts and notice this type of appearance, it doesn't automatically mean there is anything wrong with them.
How Should I Store My Soy Wax Melts?
Although frosting can happen naturally and cannot always be prevented, storing your wax melts correctly will help keep them in their best condition.
Try to keep your wax melts:
- In a cool, dry place
- Away from direct sunlight
- Away from radiators and other heat sources
- Away from areas with extreme temperature changes
- In their original packaging until you're ready to use them
During very warm weather, avoid leaving wax melts somewhere that can become particularly hot, such as on a sunny windowsill or inside a car.
Likewise, during winter, keeping them away from very cold areas followed by sudden intense heat can help reduce dramatic temperature fluctuations.
The Beauty of Handmade Soy Wax Melts
One of the things I love about handmade products is that they don't always look factory-perfect – and they aren't supposed to.
When you're buying handmade soy wax melts, slight variations in colour, finish and appearance can happen from batch to batch.
Frosting is simply another natural characteristic of soy wax.
So if one of your wax melts develops a few white patches or a frosted appearance, there is no need to throw it away. It hasn't gone bad, and it can still smell and perform just as beautifully.
At Precious Wax Sanctuary, my soy wax melts are handmade in the UK with care and are available in a huge choice of fragrances, from sweet and fruity scents to perfume-inspired, fresh, cosy and seasonal favourites.
So embrace those little imperfections – they're all part of the character of natural soy wax.
Ready to find your next favourite scent? Explore my handmade soy wax melts and discover a fragrance for every mood, season and room in your home.
Want to grab a perfectly imperfect bargain? Browse my Waxidents collection – discounted wax melts that may not look quite perfect, but still smell just as amazing.
Jade x