Odd. I have developed over 300 rolls of film using the same Paterson reels AND Photo Flo. Never a problem.
Yours is but one more data point. Surely you can allow that others have noticed an effect attributable to the use of PhotoFlo. I am not a chemist but I suspect that the effect attributable to PhotoFlo maybe a little complex. Maybe there is an interaction with other environmental factors? Clearly, the effect is not binary (all-or-nothing) and it is probably relatively small.
My personal experience, and again, I've been using Paterson reels for about 30 years, is that PhotoFlo does seem to have a small effect. Keeping the reels clean and dry and trimming the corners of the leading edge of the film have a much larger effects.
IMHO
