I've been dying my own hair for years. Although I don't always do a great job, neither have the hairdressers I've been to. I used to use a temporary dye, and recover it every two weeks. It stopped the ends from getting too dark, but kept the root regrowth down. Then they stopped making the dye I liked.
So I have switched to permanent dye. Every 3 or 4 months, I strip the colour and redye from scratch. But in the meantime, I want to retouch my roots, because at the sides, I am very grey.
So my question is, HOW do you do your own root cover, at the back of your head?
First there is the issue of SEEING the back of your head.
Secondly, how do you stop the ends of the rest of your hair hanging in the root dye?