If you use too much detergent in each load, especially if the water isn’t hot enough to dissolve the detergent, a white residue may form. This residue might look more lumpy than others.
Streaks on clothes are often caused by leftover detergent or washing powder that hasn’t been fully dissolved. This happens when you put too many clothes in your washing machine and the detergent gets caught in the folds.
Most likely, the white streaks are caused by detergent that hasn’t been fully dissolved. Make sure you’re using the right amount of detergent by reading the label on the bottle or box.