Hello there!
The title explains it all. I'm just here to share my tips/advice on how I got rid of my BACK ACNE. 
I kept it clear for about 6 years now. A little history of my back acne.
I had mild back acne starting senior year of high school and lasted until my freshman year of college. Of course it was uncomfortable and bothersome.
I took herbal medicine to clear my face acne and surprisingly after 3 months of taking it my face acne cleared. But apparently my acne grew on the my back instead of my face. So I didn't care much at the time because I was happy my face acne cleared. But it start growing a bit more then I tried to find a solution for it and it worked. But first I am not any certified professional . So it may help some people and it may not. So lets get to it. 
Advice:
1) Shower right away after a workout or sweating. Don't stay in the sweaty clothes too long (that's why I grew some more back acne).
2) Of course drink tonsssss of water!
3) Invest in loofahs! I change my loofah(the bathery 2-in-1 bath sponge) every 6 months. I just buy the round soft loofah because I don't want to tear my skin or anything.
4) wash clothes every week or two.
5) If I don't exercise that day I would still rinse my body with cool/warm water.

Products: (I only use two product or so )
1) I use  Lover's Care shower cream. One bottle would last my cousin and I for about 4 to 6 months.
- I normally buy the Cherry Blossom, or Rose hip seed oil. The Aloe vera was alright not too bad. But my favorite is the cherry blossom.
-the link [Edited link out]

2) Afterwards i use the Nature's Shea Butter soap bar.
- I buy three kind of soap bar Dudu Osun African Black Soap [Edited link out]
- Oatmeal complexion bar( my FAVORITE!) I bought 10 of these to stack up on it. [Edited link out]
- Super shea bar (it's alright, I use it when I run out of my oatmeal or dudu osun) [Edited link out]
The soap bars are expensive but it really helped my back/body acne.

Shower Routine: (Scrub GENTLY)!!!
1) I would wet my loofah
2) Pump about 3 pumps of the Lover's Care shower cream onto my loofah & scrub (gently) around my body make sure if you have long hair that it is out of the way while you're scrubbing or back/body.
3) Scrub for about 3 to 6 minutes
4) rinse body with warm/cool water
5) grab my Oatmeal soap bar and scrub(gently) it onto my skin until I see soap on my skin
6) then put the bar into my container and use my hands to lather(2 minutes) the soap around my body then rinse off with warm or cool water.
7) I do all of this after I washed my hair.

This is not any kind of promoting advertisement thing. This is what I have been using for the last few years. So if anyone try this let me know how it goes. Hope it help you guys!
If any questions just leave me a comment. Have a nice day!