Guess I am lucky. I have been running 120 film thru my fingers after the Photo-flo (fingers pre-wetted with Photo-flo) for 35 years. I have never scratched film doing this. It reduces the amount of Photo-flo that drips into the film drier and seems to promote faster drying (I do not use heat nor fan). Sheet film I just hang in the drier by one corner and use a paper towel to get rid of the drops of water on the lower corner.