Probably dumb wool dryer ball question Jul 16, 2017 13:26:07 GMT -6 via Tapatalk Post by mapleme on Jul 16, 2017 13:26:07 GMT -6 Jul 16, 2017 12:58:17 GMT -6 @criscosalad said:How do I know when they need replacing? When they are no longer recognizable as dryer balls (like unraveled yarn or similar).