I have a naturally pale, ruddy Celtic skin tone which doesn't help with the above, but lately I've been noticing my teeth are looking worse than Shane McGowan meets Pete Doherty meets the Nightmare Prince from Potsworth and Co. Can anyone suggest possible ideas to sort this out? I've tried conventional stuff like, er, using whitening toothpaste and mouthwash, and drinking less black coffee but it doesn't seem to do owt.