Started when I developed a new skin condition (which i think I have talked about elsewhere on DU(?) anyways currently I shampoo with plain borax and water and now add just a drop or 3 of shampoo to the mix, then I use a little cream rinse on the bottom half of my hair, which currently is Aussie Moist. For a few years it was only borax and sometimes vinegar and I finally decided to kick in the shampoo b/c without it you are spending much more time and energy just scrubbing your hair under the water b/c you are cleaning your hair with water and the borax just 'helps.' And my skin is better now but never will be 100% healthy so I still watch out. (I also just use plain borax to wash in the shower with instead of soap, except sometimes a drop or 3 or Miracle II soap but the soap doesn't work as well on the hair.)
I would like to go back to not using the shampoo and conditioner at all, althought it is really a tiny amount I am using, b/c it is almost impossible to find any that are free of harmful chemicals. Now that I no longer frost my hair the hair will be healthier since it has almost finished growing out, at that point I don't think I will need the conditioner anymore.
I used to mix some borax and vinegar with the water bottle together, but the borax would cluster up into little rocks. I guess borax and vinegar do not play well together but I never heard of the pre-boiling the water trick, I will have to try that.
I used to add baking soda and I just forgot about that so I may try that again, I could not recall if it made any difference. my hair tends to be kinda course and stiff and sometimes I come up with the right combination to get it soft and silky but then I forget how I did it.