My Coffee Sock looks dirty and I cannot get it white again!

When you first get your Coffee Sock it’s a lovely white, but after a
few uses it becomes stained with the colour of coffee.  This is not a bad
thing!  The Coffee Sock absorbs the oils in coffee and this will add to the
flavour of your coffee.  Yes it may look ugly but rest assured that it will
still make a great cup of coffee.  In fact we believe the older a Coffee
Sock gets the better the coffee it makes tastes!  (this assumes it is
cleaned and dried out after reach use)