Whats the best record cleaning fluid?

Halcro: What you see is bacteria / mold growth. Unfortunately, several posts on other threads have outlined these growths in that fluid. I do not know if it is a failure of the product or the water but the solution others have found is to put unused fluid in the fridge not in RCM storage tanks. I suggest you empty out the RCM any way possible . Use a solution of household bleach (10 parts water to 1 part bleach) to soak in the tank overnight. Clean, rinse and air dry the tank. In the future it maybe advisable to only "paint" each LP manually before cleaning to prevent a repeat problem. All the best.

Your container was probably not sterilized.

I don't understand this problem and why I don't have it. I no longer use L'Art du Son, but I have had a nearly full one gallon distilled water and L'Art du Son bottle sitting next to my Loricraft for over a year and have no mold. My Texas home does have central air and heat, of course, but mold does show up on food and other cultures in our house. I know that L'Art du Son does not contain any bleach given its goal to remove no vinyl when cleaning.

Is it possible that contaminated vessels or water were used in the first mixing?