Melt & Pour Soaps: The Most Common Problems (And How To Fix Them)
By Swap, Arali Workshops
If you are new to Melt & Pour soaps, let me tell you something upfront: this is supposed to be the easiest form of soap-making.
But the truth is, most people still make mistakes. Not because the process is tough — but because Melt & Pour behaves very differently from cold process soaps or facewash/bodywash bases.
So before you start experimenting with colours, swirls, and designs, let’s understand the science behind this beautiful soap base and the problems that can come along with it.
This blog will help you create cleaner bars, better designs, and fewer surprises.
What Exactly Is Melt & Pour Soap?
Melt & Pour (MP) soaps are ready-made soap bases created by professional manufacturers. They take oils + alkali, make a real soap, and then add humectants like glycerin, solvents, and stabilizers to make the final base:
– Easy to melt
– Easy to colour
– Safe to use
– Beginner-friendly
That’s why you don’t need to handle lye, you don’t need curing, and you get instant results.
But because this base has extra glycerin, it behaves differently — especially in Indian humidity.
That’s where the common mistakes start.
1) My Soap Is Sweating or Getting Dew Drops
This is the most common complaint I hear.
Why it happens:
Melt & Pour bases have a very high glycerin content. Glycerin pulls moisture from the air.
In humid weather, the surface of the soap starts showing tiny water droplets. This is not spoilage — it is just moisture.
How to fix it:
– Wrap the soap immediately after unmoulding
– Use cling wrap or shrink wrap
– Keep in an airtight box
– Do not keep soaps in open air overnight
– Avoid adding aloe gel, honey, fresh juice or hydrosols (these make sweating worse)
Best tip: Use a low-sweat base if you live in coastal or humid areas.
2) My Soap Has Cracks on Top After Setting
This usually happens when the base has been overheated.
Why it happens:
If you boil the base or heat it too quickly, it becomes unstable. When it cools, the top forms cracks.
How to fix it:
– Melt the base gently
– Keep temperature around 60–70°C
– Never boil the soap
– Use a double boiler or microwave in short intervals
– Stir continuously while melting
3)My Layers Are Separating
Layered soaps are beautiful but only if the layers hold together.
Why it happens:
– Pouring the second layer too hot
– Pouring the second layer too cold
– Not spritzing alcohol between layers
– Using too much oil or butter
How to fix it:
– Pour every layer between 48–55°C
– Lightly spray rubbing alcohol before each pour
– Keep a 2–4 minute gap between layers
– Don’t add heavy oils. They make layers slip.
4) My Powders Are Settling at the Bottom
If you are using charcoal, clay or extract powders, they may sink.
Why it happens:
– Powders are too heavy
– You added them at a very hot temperature
– You did not mix properly
How to fix it:
– Mix powders with a little glycerin first
– Add at 55–60°C
– Stir until fully blended
– Use extremely fine powders (200–400 mesh)
5) My Soap Turned Brown After Adding Fragrance
Some fragrances cause discolouration.
Why it happens:
Fragrances with vanilla or “vanillin” naturally turn soap brown over time.
How to fix it:
– Choose non-discolouring fragrances
– Use vanilla stabilizer (only if recommended with your fragrance)
– Make designs where the brown shade looks intentional
6) My Soap Feels Soft or Mushy
This usually happens with beginners because they add “too much of everything”.
Why it happens:
– Excess oils
– Too many additives
– Fresh ingredients
– Hydrosols or aloe juice
– Overheating the base
– Using poor quality soap base
How to fix it:
– Do not add oils unless formula demands it
– Stick to 0.5–1% extracts
– Avoid aloe juice, milk, tomato, fruit juice, cucumber and all raw ingredients
– Buy base from reliable suppliers
– Allow enough time to set
What You Should Not Add in Melt & Pour If You Want To Sell Them(Very Important)
This is something I repeat again and again.
Never add:
– Papaya
– Tomato
– Cucumber
– Aloe pulp
– Fresh milk
– Fruit juice
– Fresh turmeric or beetroot
– Kitchen extracts
– Honey from your kitchen
Fresh ingredients spoil, ferment, reduce shelf life, and cause sweating.
Use only:
– Cosmetic extracts
– Cosmetic colours
– Cosmetic fragrances
– Cosmetic powders
Melt & Pour is not designed for raw organic ingredients.
Melt & Pour is simple, but it still has its rules.
Every time you melt the base, think of it like chocolate.
If you overheat it, it burns or cracks.
If you add random ingredients, it spoils.
If you leave it open, it sweats.
But once you understand these basics, your soaps will look professional and stay stable for months.
This blog is meant to give you clarity and confidence before you start making your own bars.
Inside the workshop, we will go step-by-step, and I will show you exactly how to melt, mix, pour, design, unmould, and wrap each bar beautifully.
If you follow the guidelines above, you will avoid 95% of the problems that beginners face.
Feel free to comment down below with any questions or doubts you might have regarding this.
I’d be happy to help!
Cheers!
Thank you, for explaining in detail.
Glad you found it useful, Tejal!
Thank you Mam you shared the clarification for the basic principles of MnP soaps, in the form of do’s and dont’s.
Waiting for more knowledge from your side.
Always obliged.
Hey Soma!
Yes, will share lots more!
Thank you mam
Happy if it helps
Thanks mam. These points helps us a lot.
Thank you so much, happy that it helps
Really so informative and worthy of every workshop….really appreciated their services..super nice mam..all workshops are super satisfied and easy to understand mam…love u both of you 😀
Thank you so much. Happy that you’re loving our Workshops.