Thanks for the replies. I'll try re-cleaning it again. I did look closely and I don't think I rubbed off any of the emulsion but I may have added a scratch...it was hard to tell because in the time that the liquid was drying some dust appears to have settled on it. In the print this area shows up as a oval shaped patch of gray in a different shade of the actual neg along with a darker edge around it. I was thinking maybe dipping it in rubbing alcohol but I'll try another application of PEC-12.