I tried the other day a method told to me by a mum at my toddler group(i've also seen this on the net)
Its dead simple and worked on one item that i tried, all you do is wash the clothes as normal and then place it outside in the sun.
I just lay it on the bench and the stain has gone, also mite work just being placed on a window sill .
Hope that helps been meanng to add that to this thread for the last couple of days x
Sorry to be on a downer, but what is 'the sun'?