[krn001]

Was going through some old cards (80's and 90's) and found some great cards, majority in penny sleeve and top loader, a few have a film on them and was curious of or if to even attempt to clean them, like what products to use if one better than the other... appears only glossy cards have the film ... and it taste horrible.. jk but any help would be appreciated... used baby wipe and alcohol on a few, film still there

I tried a soot sponge on a few commons, it didn't harm the cards all, use google images & search "soot sponge"