Just to expand on what Dougdeacon and Lak mentioned, if the fingerprints have been on the records for any length of time, the skin oils will etch the surface of the record. This means that even though you have removed the skin oil contaminant from the record a fingerprint-shaped mark will likely remain. This mark may result in a very low level hiss or crackle during playback, or may not be noticeable at all.
Jim Pendleton
Osage Audio Products, LLC
Jim Pendleton
Osage Audio Products, LLC