Hi all! For several years I've had this 1/2-1 inch streak appear on clothing. It's always a streak, never a spot. I don't know if it's coming from the washer or dryer. Have done the obvious searching for rust spots in the washer but can't see any, and can't identify anything suspicious in the dryer, either. It looks like rust, however, nothing I've tried even fades it let alone removes it. Clorox, rust remover products, etc. So two questions.... Where is this coming from? And what else to try to remove it? Thanks!