If you are in doubt, we recommend testing a garment using cold water. Simply soak the garment without any detergent in a bucket. If you discover that the water takes on the color of the garment, dye bleed is occurring. Red knits often cause dye bleed in the laundry. Do not dry the item; instead, soak in Savvy Green's Oxygen Brightener overnight in cold water. If there is significant dye bleed, repeat. Some fabric and garment manufacturers do not meet the EU dye standards. If other clothing items are affected by dye bleed, do not dry the items; repeat the wash (without the dye bleed item) in cold water with Savvy Green laundry detergent, and add a cup of white vinegar to help remove the discolored items.