Scrim for me too, I like them big, it's easier to find a dry, clean bit. Even more so when the rubber seals start going black.
I hate old scrims, I have some that have been washed hundreds of times, they aren't as absorbent. I like a new scrim that has just been broken in, I find, being rougher, it has far more bight on the glass.
I have used scrim before we ever had squeegees. I think that saying the old scrim is best, is the biggest myth in window cleaning.
What do you other old timers have to say on this. Dai