I heard that the shrinkage in fabric happens in the last 10 minutes-ish of drying. Since batting is a fiber also, would spraying the batting with water til wet (but not as much as actually soaking in water) and putting it in a hot dryer do about the same as actually washing it? I also like the pucker so I haven't tried the method, but it seems if it weren't so wet, it would not stretch so much when handled.