Fair warning. If you are not a soapmaker, this will likely be a bit boring and nerdy.
If you make soap and use individual plastic molds, this may help you. I use silicone molds and also the Milky Way plastic molds. The silicone are, hands down, superior for ease of removing soap. I make cold process soap and have struggled with the more intricate plastic molds, trying to unmold soap without damaging it.
I figured it out today!
1. Make and pour your soap.
2. I let it sit 24 hours and then into the freezer for a couple hours; it needs to be hard!
3. Put the mold soap side down on your work surface and use a heat gun on it for a few seconds. I have had my soap fall right out perfectly intact. I did 6 or 8 today and all came out perfectly. In my picture, they are still cold and have condensation on them. But, perfect!