The last time I mixed up a batch of Star San, I was out of distilled water. As a result, I used my well water and it immediately turned cloudy. As usual, I filled my airlock with Star San, which, of course, was cloudy. The next morning, I found my airlock starting to bubble and--to my surprise--it appeared that the Star San was starting to clear. By evening, the Star San in the airlock was crystal clear. I brewed another batch yesterday, and the same process is happening. I assume that the CO2 flowing through the cloudy Star San clarifies it? Does anyone know why this happens?