I am about to embark on making a series of master prints from some of my best negatives (mostly Tri-X). Unfortunately some of these were developed under less than ideal conditions (hotel bathrooms etc) and are marred by dust and water spots, that I have been unable to remove with compressed air or an anti-static brush. I have done some research and it appears that PEC-12 and pads are favored by many people. Kodak used to make a cleaner, but it may be discontinued. There is also one made by Edwal. Obviously my prime concern is for the health of my negatives and I am curious to hear if there are any negative long term effects from the chemical contained in a cleaner such as PEC-12 etc. Thanks in advance.