Hot water rinse
I recall that some Siemens washers offered a final, heated rinse - about 60° (?!?) for quite a while. It was supposed to dramatically increase extraction, reduce drying time and reduce wrinkling.
I imagine that was the same general idea here; tho' hasn't someone, I believe Launderess, mentioned that you don't want to close up the pores on clothes washed in cotton with a cold rinse - it tends to trap the soap?
I, too, am really curious how those pin-holes got fixed. Knowing Robert, I bet it will turn out to be something so clear and logical I'll be disgusted I didn't think of it...