hi all. my dd goes to creche where they have a garden. whilst i am pleased she has lots of fun i despair because all the trousers are stained with the mud. i washed her cotton trousers at 40 on a short wash last night but there are still stains. any idea on how i can get rid of them - ideally something ecological although i am now quite resigned to use ANYTHING that will do the job!!!!! many thanks.