After one bad go around with moths I keep all wool/animal fiber yarn and wool clothing in plastic totes. Have used washing and freezing to kill the eggs, larvae, and adults. I repair moth eaten clothing before washing, less unraveling. Have read that some people have good results microwaving yarn, have not tried that though. For my closest, treating any wool that had a chance to have eggs or cocoons on it was the only way I got ahead of them. Good luck!