I think I will try that. I have never "washed" my back pretty much all my life. I let the shampoo and rinse off from the body wash do it's thing. Never broke out on my back, but I think over the past few years I've had some stress acne on my back.
Are you using a long-handled brush to wash? Do you let it sit for any amount of time, or just wash and rinse?
If you do decide to get H&S make sure it is the Classic Clean one without the conditioner. I've found that it's better to just use my hands to wash, as things like bath sponges and brushes can irritate the skin. I lather for a minute then rinse. For the Tea Tree Oil, I don't think it matters what brand you get as long it's 100% pure