I've always used box colours just for a slight change on my natural colour and added shininess but now I'm 32 and my roots are growing through with some grey which I've never had before.
Due to money and time I really just need to stick with box dyes. At the moment though my hair looks to be different colours probably due to build up of different dyes. Would it be worth using a colour stripper to go back to basics and re-dye? Or is there anything else I can do?