So as I'm getting older I'm finding I can't go as long between salon visits for my roots, the greys are at the roots only. I used to be able to go 8 weeks or so and use the L'Oréal root spray. However now (seems all of a sudden) I can barely reach 4 weeks.
I want to colour my greys at home in between salon visits. I have used olia in the past. My question is, the olia box is always so big as I don't want to do all my hair and just the roots, half of it gets wasted. What else do ppl do??