This edit is for my brunettes wearing their balayage cool-toned rather than warm and always aiming for the champagne / ashy tones rather than the golden ones.
If you'd like to keep the brassiness away, this edit will change your hair routine for the better! A routine is like a healthy diet; it's effective in the long run only if it's sustainable. In other words, it needs to be easy and enjoyable.
A few essential to know: - Your hair is balayaged, probably bleached, and consequently, to be shiny and soft, it needs moisture and hydration. -Minimal heat and UV rays are an absolute must. - The reason your balayage is not looking bleached blonde is because of the toner/gloss giving your blonde the wanted tone: this gloss will fade out from the very first shampoo and will need regular top-up at home in between salon visits.
Hair Routine suggestion + hacks
If your hair tends to be very dirty when you wash it or if you've been sweating a lot, always do two shampoos.