The Internet isn't really answering this for me so...
Last year, I stripped about eight years worth of auburn dye out of my hair and returned to my natural colour, which is quite blonde. As a result, about 4-5 inches down from my roots I have these patches of damaged hair that take longer to dry and feel almost sticky to the touch when wet and are kind of weird and frizzy when dry. It's gross and I know it's from the chemical beating my hair took to lift the red. The ends, curiously, aren't so bad, but the stuff that was near my scalp when I did all the processing is in kind of disgusting shape.
I'm not willing to get a pixie and I will just patiently wait for it to grow out enough to cut off if I have to, but is there anything that can smooth that damage for longer than one wash? I've been using a ton of reconstructor and deep-conditioning packs and I've got some argan oil and Frizz-Ease and all that, which I use after every shower, and I rarely heat-style my hair at all, and I haven't coloured it since I went back to blonde (luckily I got it almost exactly back to my natural colour) but I'm wondering if there might be a salon treatment or something that would improve its condition a bit. Keratin treatment? I don't know anything about hair, clearly.