Beauty Tip: Brighten Up Dull Locks

I think yellow hue or brassiness is the beauty headache of almost every dyed blonde. Recently I came across this interesting beauty tip in Marie Clare which promises to help fix this problem. It sounds a bit extreme though… Would you do the following to your hair to make it brighter blonde?? Mix 1 cup baby shampoo with 2 tablespoons of baking soda, comb through hair, cover with a shower cap,