I WOULD LOOK AT MY WATER SOURCE. DO YOU HAVE A LOT OF MINERALS IN THE WATER GOING TO THE WASHER? MAY WANT TO LOOK INTO A WATER TREATMENT SYSTEM IF SO. I KNOW MY OLDER SIS LIVES IN THE COUNTRY AND THE WELL WATER PRODUCED RUST ON ALL HER CLOTHES, JUST AWFUL. SO CHECK THAT FIRST. AND ARE YOU SEPERATING THINGS WELL? MAKES A HUGE DIFFERENCE, LIKE COLORS, IF NOT IN FUTURE USE PRODUCT IN EACH LOAD THAT GRABS EXTRA DYE FROM CLOTHES THAT IS RELEASED WHILE WASHING. I USE ON OCCASION, BLEACH IN WHITES, JUST GO FRUGAL ON THIS AS IT IS HARD ON THE FABRIC REPEATEDLY USED. NEW BLEACHES ARE MUCH MORE USER FRIENDLY, EVEN THOUGH I FEEL NOT AS EFFECTIVE WHEN YOU ARE TRYING TO TARGET A SPECIFIC SPOT.