Best LP cleaner fluid for fingerprints

Don't know about "best". Home brew 7:1 distilled water:IPA has been working for me. (recommended by others here on A'gon w/the addition of a small amount of surfactant which I omit). I apply with "lintless" makeup remover pads (buy a stack of 50 or 100 in a sleeve from the cosmetic section at the grocery store....very soft). Follow up by vacuuming off with a RCM. The water/IPA solution is in contact with the record surface only 1 min or so before vacuuming. Then clean again with "proprietary" record cleaning fluid (still using KAB's that came with the EV-1 machine)applied via LAST-type brush. Vacuum off again. Finger prints do go away. The IPA - even diluted - is a decent solvent for oils.

Well, looks like four of us are going to give you five different recommendations... With fingerprints, an enzyme cleaning step is very effective because it will get at the oils from the fingerprints. I've used various home brews and various commercial products over the years. The best cleaning fluid system I've used, bar none, is Walker Audio Prelude. The similarly designed Audio Intelligent is also good. Both of these cleaning fluid systems use an enzyme cleaning first step followed by a cleaning fluid, followed by an ultra pure water rinse. Other may also recommend Bugtussel enzyme cleaner.
.

I agree with Rushton, enzymes are highly effective for breaking down organic compounds like fingerprint oils. Here's a link to Audio Intelligent Vinyl Solutions, which I find more effective than Buggtussel on more kinds of contamination. It's also easier to use than Prelude (no mixing required) and has a longer shelf life. Works better than anything else I've tried.

Several vinyl audiophiles recommended “Audio Intelligent Vinyl Solutions” to me. I can honestly say it the best cleaner I’ve ever used in all respects, and really brings out some detail in my LP’s that I’ve not heard before in my analog system, (Teres 360, Tri-Planar arm, ZYX R-100 cartridge)
It’s a three step cleaning system starting with their Enzymatic Formula.
See: http://www.audiointelligent.com/
Regards,

IPA is a lousy solvent for grease and oils.

Put a drop of oil on a rag and try to clean the spot with IPA.

It won't do anything but smear.