Whats the best record cleaning fluid?

Cytocycle : The difference is that enzymes you mention are non-living created in a lab and carry certian risks.

Bacteria create natural enzymes that break down the organics to a point they and the "food"(organic material) are actually digested , leaving nothing behind but water & Co2 -- Not bad.

Some european research audio-web sites alledge that micro-chains of "organic grease(s)" coupled to inorganics(factory & household dirts) make up the majority of what I term "gunk" that disrupts the LP playback by grunging the stylas. These bacteria consume molds - all types. This bacteria product was specifically invented to consume dangerious organics : It also insidentially consumes with great effectiveness those greases that grunge recordings.

The challenge to bringing the product to market have to do with process and time. Most audioers will not wait 30 minutes to clean a side regardless of the results , except die-hards (like me). Thats the challenge. Should we be able to reduce that time to minutes, you win and you will never return to the days of 'ol.

As for "simple green" I have used the product diluted down, on only LPs that are filthy dirty with soda or foods. Difficult to spray away but can be done. I have no scientific evidence that a green douse ages LPs but the product can leave a hard residue thats a *****.

Just how much of a sonic fingerprint could 91% isopropyl alcohol and distilled water leave behind?

Zeal : That's whats surprizing. To the naked eye we see nothing. But change that, go into the micro-world , thats where the tip of stylas contacts the LP , lots of different factors affecting reproduced sound.

Of course, what one is hears is dependent on what you own and the condition/quality of the playback hard / softwear.Nevertheless, the reported experiences of tens of dozens of persons that either use steam solo in combo with RCM's all acknowledge the improvment. Even "Stereophile" acknowledges the difference, for whatever that matters.

In summary, All record cleaning fluids leave a sonic fingerprint that Steam Cleaning with the purest H2O available removes. Personally, I have discovered the scientifically cleaner the H20 the better the over-all results. All the Best

On the advice of some of the contributors here, I purchased some Art du Son cleaning fluid and mixed up about 2 litres worth of the concentrate with distilled water.
I poured about a litre into my Raven RCM and stored the remaining litre in a clear plastic bottle sitting beside the RCM.
3-4 months later, I can see some largish amounts of grey/black 'fungal- appearing' growths lying at the bottom of the plastic bottle.
This sure doesn't appear 'kosher' to me and it indicates that the same contamination is sitting UNSEEN in the storage tank of my RCM.
Two questions :-
1. What could this be and why?
2. How do I drain the storage tank of my RCM and 'flush' out the 'growth'?

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.