Hello. I have shoulder length dark blonde hair which is highlighted every 6 weeks. I am getting grey hairs showing mostly at the sides of my face and the highlights only cover them for a few days when the highlights are freshly done. I use Aussie Colour Mate shampoo and Miracle conditioner btw. I am getting fed up as the highlights cost a lot and I cant put my hair up without greys (or whites really) showing. My hairdresser says highlights wont cover grey. She uses a bleach and a darker blonder. I asked her not to leave a gap of undyed hair at the sides in between the foils to try to cover the greys but she refused saying it would look blocky? Her suggestion is to have an all over tint with a few highlights afterwards to break it up. As I only have the greys at the side and few on top that I can pull out I dont want to do that yet. Are there highlights which cover up grey for longer? I would appreciate some advice as I am not convinced by what she is saying. Its getting me down that I spend so much money and I see grey hairs within a few days.