My dd is 16 months old and i am struggling to keep her clothes looking half decent. I try not to buy pale coloured clothes because they seem to become stained very easily. For example, white long sleeved vests, The neck and cuffs are a grimy grey/brown colour that i cannot get out. I do a dd wash about once a week (rather than mixing up all of our clothes) and anything that has had something spilt on it gets put onto soak in vanish first. I use non-bio powder, comfort softner and vanish in all the washes and machine on 40 degrees. What am i doing wrong?