After 3 years of air drying only, I think I need to put mine in the dryer. They seemed to have stretched a little over the years, not by much, but enough that a slight shrinking would help.
Hey Alex! I've found that with enough time the entire sock will dry even when left inside out. However, whichever side of the sock is facing exterior will dry quicker than the interior so flipping it mid-way through the drying process can be helpful.