White Socks with feathers

[BlackBoris]

I think this has been posted before but I can't find anything. Is there some product - blue powder?? that is really good for getting white socks with long feathers clean. if not can someone recommend anything

 

[happy_talk]

we used to rinse grey/white ponies with a blue rinse (old granny stylee) to make them appear "whiter"

 

[kbsaff]

Washing Up Liquid is fab. It gets right down into the grease. It's what i use every time