There's no way around it. Sometimes a product you've made goes bad. In my lab there is - at any given time - a selection of creams, gels, and serums from a week to 5 years old standing around specifically for the purpose of being tested, monitored, and studied.
Above is a clear indication (pun totally intended) that something inside this bottle just isn't very happy any more. The cloudiness at the bottom is not supposed to be there. Its presence is a fail-safe visual warning that this face gel has turned into a bacterial bomb and is suitable for one thing only – being discarded.
Let's imagine (for a brief moment) that we don't have access to advanced microbiological testing equipment. What to do?
There are ways.
Today I'm going to pass on a few basic tips on how to check your homemade products and how to know when to toss them.