How much isopropanol is effective but safe for viny?

Surfactant?? I can answer that. It is a substance that decreases the surface tension of a liquid to promote more efficient drying. Same as some dishwasher detergents that contain one to eliminate/minimize spots on dishes.I worked at Kodak for many years and performed industrial radiography. To process the xray films we used a hand processing method (like a home photographer would in his darkroom) to process the films. The final step in the process (after rinsing) was a dunk into a tank of water that contained a very small amount of a surfactant. The films then went into a dryer
Being it was Kodak we used their own product called Photo Flo. I worked for other companies that also did manual processing of films and some used non Kodak film but they always used Photo Flo for the final rinse. It is a very high purity product and is available from photographic suppliers and even Amazon.
Ericsch mentioned mentioned he used 3 drops of surfactant in his brew. Photo Flo in our application was just one cap full of the product bottle to a five gallon tank. So, whatever volume is mixed up, very little is required. It will eliminate drying spots.

voiceofvinyl....Congrats for clearing up your statements about what chemical is a degreaser and which is a surfactant. In my earlier post I tried to explain how Photo Flo is used in the final rinse of photographic and xray films to eliminate drying spots. As others have mentioned, a very small amount of surfactant is needed to perform it's job. As a final rinse it is added to a large volume of distilled water.I know very little about wet cleaning of vinyl. I only know that the purpose used on films is to eliminate drying spots. If it could enhance the effectiveness if the detergent/degreaser during the actual cleaning process due to the "wetting" properties...I don't know. Perhaps others may be interested enough to conduct their own experiments.I'm not a chemist. I mentioned in my earlier post that some of the more popular dishwasher detergents include a wetting agent in their product to minimize drying spots on dishes. Whether that addition of the wetting agent also helps in the actual cleaning process...again I don't know.Sounds like an ambitious person may be curious to experiment.