I did, and I also tried the vinegar + baking soda thing. It was annoying to deal with, didn't look good, and would often tangle into a horiffic mess.

It still does, when I fail to shampoo and conditioner on a daily basis.

Yes, I shower without soap. I guess there's some trickle-down of shampoo, but it's not a major contributor. Hot water and light scrubbing cleans me off. If I am exceptionally dirty, I will use soap, but because I don't work outdoors, that rarely happens.

Obviously, I always wash my hands with soap.