No soaps, shower gels, or cleansing agents (other than water). I still use shampoo, but for washing my body I just use the water and a washcloth (or other scrubby thing), and I just scrub myself all over.
Of course, day to day, I still use soap on my hands (for obvious reasons) and my face (when make-up removal is needed).
The result: I'm still clean. Not only that though, but a lot of skin problems that I suffered from my whole life have disappeared. The skin on my elbows no longer becomes sandpaper. The horrible body-acne that has always infected my chest and shoulders since I was a teenager is no more...or at least, only flares up occasionally during a certain time of month, but even then it's much milder than it was before.
I also find that I actually smell BETTER, at least to myself. When I need a shower, my armpits still get a bit stinky, but not to the extent that they used to before. I find that I no longer need to use deodorant at all.
Also, the skin on my legs used to dry out too, and that's stopped. Now, the only parts of my body that I need to moisturize are my hands and my face (coincidentally the only two parts of my body that I still wash with soap...I suppose I could try to scrub make-up off my face with only water, but the hands thing is non-negotiable since I don't want to give myself some sort of medieval dirty disease.)
The reason I'm telling you this is because I kind of wish I had done this long ago...maybe then I wouldn't have stupid acne scars on my chest.