As two types of film base are affected, and presumably two styles of film development are used, a common cause seems to lie outside the actual processing. I find it hard to believe the idea that pre-soaking the film can scratch the non-emulsion side. So I'd like to ask how the film is stored before use? In a freezer compartment of a fridge or just in the cool compartment? And how quickly is it normally warmed up to room temperature?