Hey I was wondering if this product worked or not because I have gotten my hair "spot treated" to fix a box color I had done and then recently I got it professionally bleached "corrective colored" and toned which cost me 100 dollars!  The top is a beautiful bleach blonde but I have found that the underneath of my hair stayed brassy. I am desperate, do you think this would work for me? Would it lighten the underneath and keep the top bleach blonde? I also use Clairol shimmer lights shampoo and conditioner.