Why Did Your Cosmetic Formula Turn Cloudy?

Based on the ingredients you used (PEG-7 Glyceryl Cocoate, PEG-6 Caprylic/Capric Glycerides, Phenoxyethanol, and water) and the observation that the clear mixture turned cloudy/milky after about two months, the most likely cause is microbial contamination.

Here's why this happens:

• Microbial Growth: Water-based formulations are susceptible to contamination by bacteria, yeast, and mold from the environment, ingredients, or even during use (e.g., from dipping fingers). These microorganisms can grow and multiply in the solution, causing it to become cloudy or milky.
• Preservative Limitations: While Phenoxyethanol is a common preservative, it may not be effective against all types of microorganisms, particularly certain fungi, when used alone or at lower concentrations. The concentration you used (0.6%) is within the typical range (0.5-1.0%), but its effectiveness depends on the overall formula and how it's handled.
• Time and Exposure: Over two months, if contamination occurred, there would be sufficient time for microbial populations to grow to a level that causes visible cloudiness.

Can You Still Use It?

No, it is not recommended to use the product once it has turned cloudy. The change in appearance indicates that the product is no longer stable and likely contains a significant amount of microbial growth. Using a contaminated product can lead to skin irritation, infection, or other adverse reactions.

To prevent this in the future, ensure strict hygiene during preparation, use clean and sterilized containers, and store the product properly. If you continue to experience this issue, you might consider using a preservative blend that offers broader protection against a wider range of microorganisms.