I color at home with professional color; I went a little redder over the past few months and now I'm getting hot roots.
I've been doing some reading up and it looks like I should go one shade darker (level 7 in my case) on root touch ups and use one shade lighter (a level 6) when refreshing the ends. I also understand I need to use a neutral base with the red in proportion to my grays.
Does this make sense? I would love to hear insights on how to avoid hot roots!