Hi all, my daughter wore her white pikeur breeches draghunting (did not listen to her mum when said they will get ruined!) anyway, they have got stained from mud splatters that will not come out. We have soaked in vanish, sprayed with vanish and washed 3 times at 30deg (manufacturer recommendations), worried about trying hotter as have a black waistband. The stains still remain, could anyone offer some tips on removing these stains??! thanks