Hi, we recently bought a John Lewis washer dryer, and every time I wash one of my sons football shirts (wash only, I air dry then) they come out with more marks than before: imgur.com/a/OnMvoVw
It looks almost like an oily/greasy stain... it doesn’t do it to anything but this football shirt type fabric. I’ve tried lots of different stain removers (Aeriel, Astonish, Tesco) but it just comes out worse than before. Any ideas what could be causing this please, and how I fix it?