Blue Stains Showing Up on Washed Clothing | ThriftyFun
Any kind of detergent, chlorine bleach, ammonia, borax, or oxygen cleaner binds the copper blue in the water to fabric in the laundry. If you fill the tub with water and detergent and agitate to mix before adding the laundry, things will get a uniform bluish cast, rather than dark areas where the water runs onto concentrated detergent …