Prepare your workspace. Weigh out every ingredient into its proper phase — water phase, oil phase, cool-down phase — before you begin heating anything at all.
Combine the water phase. Combine the distilled water, vegetable glycerin, propylene glycol, tetrasodium EDTA, and SCI in a heat-safe container.
Combine the water phase. Combine the distilled water, vegetable glycerin, propylene glycol, tetrasodium EDTA, and SCI in a heat-safe container.
Begin whipping. Pour the heated water phase into a tall mixing container and give it a light pass with your hand mixer. Some bubbling here is completely normal.
Begin whipping. Pour the heated water phase into a tall mixing container and give it a light pass with your hand mixer. Some bubbling here is completely normal.
Combine. Pour the oil phase into the water phase and mix well. The bubbles will get a little wild, but they shouldn't escape the container. At this stage, the mixture is still quite runny.
Add the cool-down phase. Once the mixture has dropped below 110°F (43°C), mix in the Liquid Germall Plus (and fragrance oil, if using) until fully incorporated.
Let it cool. Allow the base to cool, stirring occasionally. You'll notice it beginning to thicken as it does.
Whip it. Once fully cooled, give it a good whip with your hand mixer until it reaches a light, fluffy, cloud-like texture.
Jar it up and let it set. Transfer to your sanitized container. Label with the date made.