how to clean nasty, dirty finger prints on LPs


I tried with Distilled water/Alchol/detergent combo, Emgzine, steamer, scrubbing. none of them works.
any suggestion?
128x128xctian
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try some premier record cleaner (music direct or accoustic sounds) than a scrub with a record cleaning machine seems to work fine for me.
Some finger prints leave a permanent mark but I'm finding that most are pretty well eliminated by the combination of Disc Doctor fluid, steam, reagent grade rince, and the VPI 16.5. All these things together contribute and honestly marks hardly ever persist. The steam and Disc Doctor break it up. The Disc Doctor emulsifies it. The steam and reagent grade water rince it and the DD fluid away. The vacuum sucks it up to almost completely dry. I then allow the disc to sit in a dish rack to completely dry before sticking it in a MoFI sleeve. Pretty much all that doesn't come off are scratches and sleeve scuff.
I applied with 100% Ethly Alcohol on a piece of face tisuue, rubbed on the finger prints, rinsed it with distilled water, repeated a couple of times. most of finger prints are gone, or get thinner.
However, I feel the sound is getting bit thinner also now comparing to the other side I don't clean. It could be just me. :-(