I had a full head of ashy blonde balayage done in October, then a half head at the end of November. Three weeks later it's looking a little too honey/caramel, and I already use pureology platinum shampoo and conditioner, and Touch of Silver shampoo twice a week. I would like to know if I can put toner on it myself, now, to cool it down again rather than waiting three weeks to see the hairdresser again, or does it only work if you apply it straight after the bleach?