Walker prelude vs. Audio Intelligent

Thanks Jimothya. Very informative. Agree on microscope. Chemical analysis and microscope would be even better. But, highly impractical.

OK. Thanks to all for the input. I'm impressed by Walkers fresh enzyme approach, but AI seems to present less of a problem in terms of what is left on the vinyl at the end of the process than step4 of Prelude (although there appears to be a method to Lloyds madness). Any chemists have an idea as to whether a small amount of alcohol in last application can lead to any dryout or breakdown of vinyl? After all, my approach to vinyl is like a doctor-patient. First, do no harm.

I have not tried either cleaner. According to the info in various threads and the products websites, the final rise with AI's last step is pure de-ionized and highly filtered water whereas Walker has a very small amount of alcohol and another ingredient in the 4th step rinse. These ingredients, I surmise, may be left on the vinyl at the end of the cycle. Of course it is possible as well that the alcohol and extra ingredient is not left behind or left behind in such amounts as to not have any impact whatsoever on the vinyl even over the long term. That's why i referenced chemists in my latest query. If you have LLoyd's ear Jtimothya, I'd love to hear the theory as to why the final rinse is something other than pure filtered de-ionized H2O. What's the upside and downside (if any) to additional ingredients?