I sometimes have to come back to it, but rarely now, maybe once a year. But I changed many things about my oral and physical health so hard to say what is keeping them mineralized.
What other things did you change about oral health? I’ve been using probiotics and biofilm dissolvers to great success, but am always looking for more ways.
FWIW if you want a "quick and easy" (not necessarily great/long term) solution, toothpastes like sensodyne do work pretty decently. I had very painful teeth as a kid, reducing (gum/tooth) inflammation + a few weeks of those tooth-sensitivity toothpaste has reduced my sensitivity permanently by a good bit, maybe 60%.
I already use Sensodyne protect and repair (stannous fluoride and potassium something, not Novamin) and while it does certainly help I just want a permanent fix because the sensitivity has gotten really, really tiresome.
Did your dentist give any suggestions? In my case I was irritating my gums while brushing, and switching to an ultra-soft toothbrush let me clean my teeth much better. I very much recommend asking your dentist and using an ultra-soft brush ("soft" brushes are average hard, the naming is atrocious).