Are the load items discolored?
Dye transfer can occur when mixing colors in a load.
Sort loads before laundering.
Separate dark load items from lights and whites. Mixing different colors may result in dye transferring to the lighter color items, giving them a dingy appearance.
Always use HE Detergent and follow the detergent manufacture's recommended amount.
Refer to the video below for proper sorting and loading of your clothing: