I have medium brown shoulder length hair which is mainly salon coloured every 6 weeks or so. The grey roots are starting to show after 3 weeks so I use the Wella spray to disguise them. It works well but dries out my hair! I would like to lighten the shade to some sort of caramel / dark blonde but don't want high lights as they also had a drying effect previously! Would there be a lot of peroxide used to lighten say by 3 or 4 shades? I think I would get longer out of the colour this way. Any advice and experiences welcome! Are you happy that you've gone from brunette to blonde?