Whats the best record cleaning fluid?

I have been told by a chemist that the reverse osmosis filter yields water as pure as distilled water.

That's quite far from truth. With good feed water a sinle stage RO will deliver a purity somewhere between 17 to 20 uSiemens. A two stage RO should bring that down around 8 to 10 uSiemens. Distilled water has a conductivity around 1 uSiemens.

Those results are with industrial RO systems, them 'under the sink' ROs will never get near theose figures.

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Psychianimal, thanks. He seemed to suggest that they don't trust distilled water and do use RO systems for their water. I do have a two stage unit. I guess then the question becomes does it make any difference in cleaning records.

Try L'art du Son, it's expensive but sold contentrated so it will make over a gallon. It's biodegradable and is alcohol free, theres absolutley nothing in it that can harm you or your records. Check out the review here.
www.smartdev.com/lart_review.html

grahamester, as I said above, I have tried it.

Where does one get commercial grade alcohol (is 91% at the pharmacy enough)?
Where does one get this 2 stage RO water from?
Thanks
Chris