Bleaching help

Can`t afford stylist - need advice; My hair is naturally medium/dark brown.l Have highlighted for years and totally blonde for a couple yrs. Every stylist (at least 7 different) has trouble with orange/brassiness. I`ve only had it come out successfully ONE time but I was never able to find out what she used. My hair was almost platimum and the roots were a beautiful color, dark greyish/blonde. We have a beauty supply here but I was hoping to get some advice on what to buy...drugstore brands never seem to get the job done. Prefer to touch up/tone in one step like she did. My hair is very strong and has never broken even after multiple bleach treatments. What level developer? How can I make sure there is NO red or orange or dirty yellow tone when I retouch? Th blue inky stuff stained my hair once, so I want to shy away from that! Thanks for your help!

When I do my daughters hair I add a few drops of `Red-Gold Color corrector" to the haircoloring. It automatically ashens those reds hues etc. in the same process.
Ms K is one brand I found at our local Beauty Supply store. But I know there are several others on the market.

can i ask........ why dont u try using a gentler dye...instead of using bleach?