I'm so confused 
I have highlights in my hair to lighten it a bit in an attempt to hide the greys.
I (was) naturally dark brown, now more of a mid brown with light brown/almost blonde highlights.
So the highlights only get done every once in a while for regrowth but how often do I need to get the toner part done?
Can I tone it myself?
I saw some JW gloss toners in Boots but do I go for darker brown or for blonde? Does the toner just 'attach' to the highlighted hair?
Clueless!