I thought that it would be the end of my problems when I descovered Vanish Cristal White. But... I have a big problem with muddy clothes, white school poloshirts/shirts especially. I was told to let the mud dry and then brush it off and then wash it. It work when there isn't too much mud but my DSs always come back plastered with mud from school. I am now facing this : getting them a brand new set of tops every week or send them to school with clean but still stained tops. Please tell me you have got a magic tip that works on really heavy mud staines.